Version %s addressed some security issues.' ), '4.6.2' ); ?> + the release notes.' ), 'https://codex.wordpress.org/Version_4.6.2' ); ?> +

Version %1$s addressed some security issues and fixed %2$s bug.', 'Version %1$s addressed some security issues and fixed %2$s bugs.', 15 ), '4.6.1', number_format_i18n( 15 ) ); ?> the release notes.' ), 'https://codex.wordpress.org/Version_4.6.1' ); ?> diff --git a/wp-admin/includes/class-wp-screen.php b/wp-admin/includes/class-wp-screen.php index a7d9a1a5..96787591 100644 --- a/wp-admin/includes/class-wp-screen.php +++ b/wp-admin/includes/class-wp-screen.php @@ -915,7 +915,8 @@ final class WP_Screen { switch ( $this->base ) { case 'widgets': - $this->_screen_settings = '

' . __('Enable accessibility mode') . '' . __('Disable accessibility mode') . "

\n"; + $nonce = wp_create_nonce( 'widgets-access' ); + $this->_screen_settings = '

' . __('Enable accessibility mode') . '' . __('Disable accessibility mode') . "

\n"; break; case 'post' : $expand = '

' . __( 'Additional settings' ) . ''; diff --git a/wp-admin/includes/media.php b/wp-admin/includes/media.php index c6b2dcd1..7ff6e4a6 100644 --- a/wp-admin/includes/media.php +++ b/wp-admin/includes/media.php @@ -290,7 +290,7 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override $url = $file['url']; $type = $file['type']; $file = $file['file']; - $title = sanitize_title( $name ); + $title = sanitize_text_field( $name ); $content = ''; $excerpt = ''; diff --git a/wp-admin/update-core.php b/wp-admin/update-core.php index 404bb8ac..e123463b 100644 --- a/wp-admin/update-core.php +++ b/wp-admin/update-core.php @@ -253,6 +253,8 @@ function list_plugin_updates() { $plugin_data ) { + $plugin_data = (object) _get_plugin_data_markup_translate( $plugin_file, (array) $plugin_data, false, true ); + // Get plugin compat for running version of WordPress. if ( isset($plugin_data->update->tested) && version_compare($plugin_data->update->tested, $cur_wp_version, '>=') ) { $compat = '
' . sprintf(__('Compatibility with WordPress %1$s: 100%% (according to its author)'), $cur_wp_version); diff --git a/wp-admin/widgets.php b/wp-admin/widgets.php index a9876b89..c70b1d1a 100644 --- a/wp-admin/widgets.php +++ b/wp-admin/widgets.php @@ -22,6 +22,8 @@ if ( ! current_user_can( 'edit_theme_options' ) ) { $widgets_access = get_user_setting( 'widgets_access' ); if ( isset($_GET['widgets-access']) ) { + check_admin_referer( 'widgets-access' ); + $widgets_access = 'on' == $_GET['widgets-access'] ? 'on' : 'off'; set_user_setting( 'widgets_access', $widgets_access ); } diff --git a/wp-content/plugins/akismet/readme.txt b/wp-content/plugins/akismet/readme.txt index 41c75408..a21862a0 100644 --- a/wp-content/plugins/akismet/readme.txt +++ b/wp-content/plugins/akismet/readme.txt @@ -2,7 +2,7 @@ Contributors: matt, ryan, andy, mdawaffe, tellyworth, josephscott, lessbloat, eoigal, cfinke, automattic, jgs Tags: akismet, comments, spam, antispam, anti-spam, anti spam, comment moderation, comment spam, contact form spam, spam comments Requires at least: 3.7 -Tested up to: 4.6.1 +Tested up to: 4.7 Stable tag: 3.2 License: GPLv2 or later diff --git a/wp-includes/Requests/IRI.php b/wp-includes/Requests/IRI.php index 44a95171..8dc2fa28 100644 --- a/wp-includes/Requests/IRI.php +++ b/wp-includes/Requests/IRI.php @@ -688,10 +688,7 @@ class Requests_IRI { $isauthority = $this->iuserinfo !== null || $this->ihost !== null || $this->port !== null; if ($this->ipath !== '' && ( - $isauthority && ( - $this->ipath[0] !== '/' || - substr($this->ipath, 0, 2) === '//' - ) || + $isauthority && $this->ipath[0] !== '/' || ( $this->scheme === null && !$isauthority && diff --git a/wp-includes/Requests/Transport/cURL.php b/wp-includes/Requests/Transport/cURL.php index 7979b2eb..4429edb6 100644 --- a/wp-includes/Requests/Transport/cURL.php +++ b/wp-includes/Requests/Transport/cURL.php @@ -375,8 +375,9 @@ class Requests_Transport_cURL implements Requests_Transport { curl_setopt($this->handle, CURLOPT_URL, $url); curl_setopt($this->handle, CURLOPT_REFERER, $url); curl_setopt($this->handle, CURLOPT_USERAGENT, $options['useragent']); - curl_setopt($this->handle, CURLOPT_HTTPHEADER, $headers); - + if (!empty($headers)) { + curl_setopt($this->handle, CURLOPT_HTTPHEADER, $headers); + } if ($options['protocol_version'] === 1.1) { curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1); } @@ -458,7 +459,7 @@ class Requests_Transport_cURL implements Requests_Transport { * @param string $data Body data * @return integer Length of provided data */ - protected function stream_body($handle, $data) { + public function stream_body($handle, $data) { $this->hooks->dispatch('request.progress', array($data, $this->response_bytes, $this->response_byte_limit)); $data_length = strlen($data); diff --git a/wp-includes/Requests/Transport/fsockopen.php b/wp-includes/Requests/Transport/fsockopen.php index e9170f41..21cb56d5 100644 --- a/wp-includes/Requests/Transport/fsockopen.php +++ b/wp-includes/Requests/Transport/fsockopen.php @@ -70,7 +70,9 @@ class Requests_Transport_fsockopen implements Requests_Transport { // HTTPS support if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https') { $remote_socket = 'ssl://' . $host; - $url_parts['port'] = 443; + if (!isset($url_parts['port'])) { + $url_parts['port'] = 443; + } $context_options = array( 'verify_peer' => true, @@ -97,6 +99,7 @@ class Requests_Transport_fsockopen implements Requests_Transport { } if (isset($options['verifyname']) && $options['verifyname'] === false) { + $context_options['verify_peer_name'] = false; $verifyname = false; } @@ -171,7 +174,7 @@ class Requests_Transport_fsockopen implements Requests_Transport { if (!isset($case_insensitive_headers['Host'])) { $out .= sprintf('Host: %s', $url_parts['host']); - if ($url_parts['port'] !== 80) { + if (( 'http' === strtolower($url_parts['scheme']) && $url_parts['port'] !== 80 ) || ( 'https' === strtolower($url_parts['scheme']) && $url_parts['port'] !== 443 )) { $out .= ':' . $url_parts['port']; } $out .= "\r\n"; diff --git a/wp-includes/class-http.php b/wp-includes/class-http.php index c0272ba4..5a307584 100644 --- a/wp-includes/class-http.php +++ b/wp-includes/class-http.php @@ -332,6 +332,7 @@ class WP_Http { // SSL certificate handling if ( ! $r['sslverify'] ) { $options['verify'] = false; + $options['verifyname'] = false; } else { $options['verify'] = $r['sslcertificates']; } @@ -362,8 +363,8 @@ class WP_Http { } } - // Work around a bug in Requests when the path starts with // See https://github.com/rmccue/Requests/issues/231 - $url = preg_replace( '!^(\w+://[^/]+)//(.*)$!i', '$1/$2', $url ); + // Avoid issues where mbstring.func_overload is enabled + mbstring_binary_safe_encoding(); try { $requests_response = Requests::request( $url, $headers, $data, $type, $options ); @@ -379,6 +380,8 @@ class WP_Http { $response = new WP_Error( 'http_request_failed', $e->getMessage() ); } + reset_mbstring_encoding(); + /** * Fires after an HTTP API response is received and before the response is returned. * diff --git a/wp-includes/class-phpmailer.php b/wp-includes/class-phpmailer.php index b28c4ef2..0e48d726 100644 --- a/wp-includes/class-phpmailer.php +++ b/wp-includes/class-phpmailer.php @@ -31,7 +31,7 @@ class PHPMailer * The PHPMailer Version number. * @var string */ - public $Version = '5.2.14'; + public $Version = '5.2.22'; /** * Email priority. @@ -201,6 +201,9 @@ class PHPMailer /** * An ID to be used in the Message-ID header. * If empty, a unique id will be generated. + * You can set your own, but it must be in the format "", + * as defined in RFC5322 section 3.6.4 or it will be ignored. + * @see https://tools.ietf.org/html/rfc5322#section-3.6.4 * @var string */ public $MessageID = ''; @@ -285,7 +288,7 @@ class PHPMailer /** * SMTP auth type. - * Options are LOGIN (default), PLAIN, NTLM, CRAM-MD5 + * Options are CRAM-MD5, LOGIN, PLAIN, attempted in that order if not specified * @var string */ public $AuthType = ''; @@ -352,6 +355,7 @@ class PHPMailer /** * Whether to split multiple to addresses into multiple messages * or send them all in one message. + * Only supported in `mail` and `sendmail` transports, not in SMTP. * @var boolean */ public $SingleTo = false; @@ -394,7 +398,7 @@ class PHPMailer /** * DKIM Identity. - * Usually the email address used as the source of the email + * Usually the email address used as the source of the email. * @var string */ public $DKIM_identity = ''; @@ -419,6 +423,13 @@ class PHPMailer */ public $DKIM_private = ''; + /** + * DKIM private key string. + * If set, takes precedence over `$DKIM_private`. + * @var string + */ + public $DKIM_private_string = ''; + /** * Callback Action function name. * @@ -446,6 +457,15 @@ class PHPMailer */ public $XMailer = ''; + /** + * Which validator to use by default when validating email addresses. + * May be a callable to inject your own validator, but there are several built-in validators. + * @see PHPMailer::validateAddress() + * @var string|callable + * @static + */ + public static $validator = 'auto'; + /** * An instance of the SMTP sender class. * @var SMTP @@ -634,9 +654,11 @@ class PHPMailer * Constructor. * @param boolean $exceptions Should we throw external exceptions? */ - public function __construct($exceptions = false) + public function __construct($exceptions = null) { - $this->exceptions = (boolean)$exceptions; + if ($exceptions !== null) { + $this->exceptions = (boolean)$exceptions; + } } /** @@ -645,9 +667,7 @@ class PHPMailer public function __destruct() { //Close any open SMTP connection nicely - if ($this->Mailer == 'smtp') { - $this->smtpClose(); - } + $this->smtpClose(); } /** @@ -671,14 +691,16 @@ class PHPMailer } else { $subject = $this->encodeHeader($this->secureHeader($subject)); } - if (ini_get('safe_mode') || !($this->UseSendmailOptions)) { + + //Can't use additional_parameters in safe_mode, calling mail() with null params breaks + //@link http://php.net/manual/en/function.mail.php + if (ini_get('safe_mode') or !$this->UseSendmailOptions or is_null($params)) { $result = @mail($to, $subject, $body, $header); } else { $result = @mail($to, $subject, $body, $header, $params); } return $result; } - /** * Output debugging info via user-defined method. * Only generates output if SMTP debug output is enabled (@see SMTP::$do_debug). @@ -713,7 +735,7 @@ class PHPMailer case 'echo': default: //Normalize line breaks - $str = preg_replace('/(\r\n|\r|\n)/ms', "\n", $str); + $str = preg_replace('/\r\n?/ms', "\n", $str); echo gmdate('Y-m-d H:i:s') . "\t" . str_replace( "\n", "\n \t ", @@ -850,7 +872,7 @@ class PHPMailer $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim if (($pos = strrpos($address, '@')) === false) { // At-sign is misssing. - $error_message = $this->lang('invalid_address') . $address; + $error_message = $this->lang('invalid_address') . " (addAnAddress $kind): $address"; $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { @@ -900,7 +922,7 @@ class PHPMailer return false; } if (!$this->validateAddress($address)) { - $error_message = $this->lang('invalid_address') . $address; + $error_message = $this->lang('invalid_address') . " (addAnAddress $kind): $address"; $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { @@ -923,6 +945,61 @@ class PHPMailer return false; } + /** + * Parse and validate a string containing one or more RFC822-style comma-separated email addresses + * of the form "display name

" into an array of name/address pairs. + * Uses the imap_rfc822_parse_adrlist function if the IMAP extension is available. + * Note that quotes in the name part are removed. + * @param string $addrstr The address list string + * @param bool $useimap Whether to use the IMAP extension to parse the list + * @return array + * @link http://www.andrew.cmu.edu/user/agreen1/testing/mrbs/web/Mail/RFC822.php A more careful implementation + */ + public function parseAddresses($addrstr, $useimap = true) + { + $addresses = array(); + if ($useimap and function_exists('imap_rfc822_parse_adrlist')) { + //Use this built-in parser if it's available + $list = imap_rfc822_parse_adrlist($addrstr, ''); + foreach ($list as $address) { + if ($address->host != '.SYNTAX-ERROR.') { + if ($this->validateAddress($address->mailbox . '@' . $address->host)) { + $addresses[] = array( + 'name' => (property_exists($address, 'personal') ? $address->personal : ''), + 'address' => $address->mailbox . '@' . $address->host + ); + } + } + } + } else { + //Use this simpler parser + $list = explode(',', $addrstr); + foreach ($list as $address) { + $address = trim($address); + //Is there a separate name part? + if (strpos($address, '<') === false) { + //No separate name, just use the whole thing + if ($this->validateAddress($address)) { + $addresses[] = array( + 'name' => '', + 'address' => $address + ); + } + } else { + list($name, $email) = explode('<', $address); + $email = trim(str_replace('>', '', $email)); + if ($this->validateAddress($email)) { + $addresses[] = array( + 'name' => trim(str_replace(array('"', "'"), '', $name)), + 'address' => $email + ); + } + } + } + } + return $addresses; + } + /** * Set the From and FromName properties. * @param string $address @@ -939,7 +1016,7 @@ class PHPMailer if (($pos = strrpos($address, '@')) === false or (!$this->has8bitChars(substr($address, ++$pos)) or !$this->idnSupported()) and !$this->validateAddress($address)) { - $error_message = $this->lang('invalid_address') . $address; + $error_message = $this->lang('invalid_address') . " (setFrom) $address"; $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { @@ -972,19 +1049,30 @@ class PHPMailer /** * Check that a string looks like an email address. * @param string $address The email address to check - * @param string $patternselect A selector for the validation pattern to use : + * @param string|callable $patternselect A selector for the validation pattern to use : * * `auto` Pick best pattern automatically; * * `pcre8` Use the squiloople.com pattern, requires PCRE > 8.0, PHP >= 5.3.2, 5.2.14; * * `pcre` Use old PCRE implementation; * * `php` Use PHP built-in FILTER_VALIDATE_EMAIL; * * `html5` Use the pattern given by the HTML5 spec for 'email' type form input elements. * * `noregex` Don't use a regex: super fast, really dumb. + * Alternatively you may pass in a callable to inject your own validator, for example: + * PHPMailer::validateAddress('user@example.com', function($address) { + * return (strpos($address, '@') !== false); + * }); + * You can also set the PHPMailer::$validator static to a callable, allowing built-in methods to use your validator. * @return boolean * @static * @access public */ - public static function validateAddress($address, $patternselect = 'auto') + public static function validateAddress($address, $patternselect = null) { + if (is_null($patternselect)) { + $patternselect = self::$validator; + } + if (is_callable($patternselect)) { + return call_user_func($patternselect, $address); + } //Reject line breaks in addresses; it's valid RFC5322, but not RFC5321 if (strpos($address, "\n") !== false or strpos($address, "\r") !== false) { return false; @@ -1161,7 +1249,7 @@ class PHPMailer } $this->$address_kind = $this->punyencodeAddress($this->$address_kind); if (!$this->validateAddress($this->$address_kind)) { - $error_message = $this->lang('invalid_address') . $this->$address_kind; + $error_message = $this->lang('invalid_address') . ' (punyEncode) ' . $this->$address_kind; $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { @@ -1172,7 +1260,7 @@ class PHPMailer } // Set whether the message is multipart/alternative - if (!empty($this->AltBody)) { + if ($this->alternativeExists()) { $this->ContentType = 'multipart/alternative'; } @@ -1206,9 +1294,11 @@ class PHPMailer // Sign with DKIM if enabled if (!empty($this->DKIM_domain) - && !empty($this->DKIM_private) && !empty($this->DKIM_selector) - && file_exists($this->DKIM_private)) { + && (!empty($this->DKIM_private_string) + || (!empty($this->DKIM_private) && file_exists($this->DKIM_private)) + ) + ) { $header_dkim = $this->DKIM_Add( $this->MIMEHeader . $this->mailHeader, $this->encodeHeader($this->secureHeader($this->Subject)), @@ -1274,19 +1364,24 @@ class PHPMailer */ protected function sendmailSend($header, $body) { - if ($this->Sender != '') { + // CVE-2016-10033, CVE-2016-10045: Don't pass -f if characters will be escaped. + if (!empty($this->Sender) and self::isShellSafe($this->Sender)) { if ($this->Mailer == 'qmail') { - $sendmail = sprintf('%s -f%s', escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender)); + $sendmailFmt = '%s -f%s'; } else { - $sendmail = sprintf('%s -oi -f%s -t', escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender)); + $sendmailFmt = '%s -oi -f%s -t'; } } else { if ($this->Mailer == 'qmail') { - $sendmail = sprintf('%s', escapeshellcmd($this->Sendmail)); + $sendmailFmt = '%s'; } else { - $sendmail = sprintf('%s -oi -t', escapeshellcmd($this->Sendmail)); + $sendmailFmt = '%s -oi -t'; } } + + // TODO: If possible, this should be changed to escapeshellarg. Needs thorough testing. + $sendmail = sprintf($sendmailFmt, escapeshellcmd($this->Sendmail), $this->Sender); + if ($this->SingleTo) { foreach ($this->SingleToArray as $toAddr) { if (!@$mail = popen($sendmail, 'w')) { @@ -1332,6 +1427,40 @@ class PHPMailer return true; } + /** + * Fix CVE-2016-10033 and CVE-2016-10045 by disallowing potentially unsafe shell characters. + * + * Note that escapeshellarg and escapeshellcmd are inadequate for our purposes, especially on Windows. + * @param string $string The string to be validated + * @see https://github.com/PHPMailer/PHPMailer/issues/924 CVE-2016-10045 bug report + * @access protected + * @return boolean + */ + protected static function isShellSafe($string) + { + // Future-proof + if (escapeshellcmd($string) !== $string + or !in_array(escapeshellarg($string), array("'$string'", "\"$string\"")) + ) { + return false; + } + + $length = strlen($string); + + for ($i = 0; $i < $length; $i++) { + $c = $string[$i]; + + // All other characters have a special meaning in at least one common shell, including = and +. + // Full stop (.) has a special meaning in cmd.exe, but its impact should be negligible here. + // Note that this does permit non-Latin alphanumeric characters based on the current locale. + if (!ctype_alnum($c) && strpos('@_-.', $c) === false) { + return false; + } + } + + return true; + } + /** * Send mail using the PHP mail() function. * @param string $header The message headers @@ -1349,17 +1478,20 @@ class PHPMailer } $to = implode(', ', $toArr); - if (empty($this->Sender)) { - $params = ' '; - } else { - $params = sprintf('-f%s', $this->Sender); + $params = null; + //This sets the SMTP envelope sender which gets turned into a return-path header by the receiver + if (!empty($this->Sender) and $this->validateAddress($this->Sender)) { + // CVE-2016-10033, CVE-2016-10045: Don't pass -f if characters will be escaped. + if (self::isShellSafe($this->Sender)) { + $params = sprintf('-f%s', $this->Sender); + } } - if ($this->Sender != '' and !ini_get('safe_mode')) { + if (!empty($this->Sender) and !ini_get('safe_mode') and $this->validateAddress($this->Sender)) { $old_from = ini_get('sendmail_from'); ini_set('sendmail_from', $this->Sender); } $result = false; - if ($this->SingleTo && count($toArr) > 1) { + if ($this->SingleTo and count($toArr) > 1) { foreach ($toArr as $toAddr) { $result = $this->mailPassthru($toAddr, $this->Subject, $body, $header, $params); $this->doCallback($result, array($toAddr), $this->cc, $this->bcc, $this->Subject, $body, $this->From); @@ -1409,10 +1541,10 @@ class PHPMailer if (!$this->smtpConnect($this->SMTPOptions)) { throw new phpmailerException($this->lang('smtp_connect_failed'), self::STOP_CRITICAL); } - if ('' == $this->Sender) { - $smtp_from = $this->From; - } else { + if (!empty($this->Sender) and $this->validateAddress($this->Sender)) { $smtp_from = $this->Sender; + } else { + $smtp_from = $this->From; } if (!$this->smtp->mail($smtp_from)) { $this->setError($this->lang('from_failed') . $smtp_from . ' : ' . implode(',', $this->smtp->getError())); @@ -1466,12 +1598,17 @@ class PHPMailer * @throws phpmailerException * @return boolean */ - public function smtpConnect($options = array()) + public function smtpConnect($options = null) { if (is_null($this->smtp)) { $this->smtp = $this->getSMTPInstance(); } + //If no options are provided, use whatever is set in the instance + if (is_null($options)) { + $options = $this->SMTPOptions; + } + // Already connected? if ($this->smtp->connected()) { return true; @@ -1541,7 +1678,7 @@ class PHPMailer if (!$this->smtp->startTLS()) { throw new phpmailerException($this->lang('connect_host')); } - // We must resend HELO after tls negotiation + // We must resend EHLO after TLS negotiation $this->smtp->hello($hello); } if ($this->SMTPAuth) { @@ -1580,7 +1717,7 @@ class PHPMailer */ public function smtpClose() { - if ($this->smtp !== null) { + if (is_a($this->smtp, 'SMTP')) { if ($this->smtp->connected()) { $this->smtp->quit(); $this->smtp->close(); @@ -1599,6 +1736,19 @@ class PHPMailer */ public function setLanguage($langcode = 'en', $lang_path = '') { + // Backwards compatibility for renamed language codes + $renamed_langcodes = array( + 'br' => 'pt_br', + 'cz' => 'cs', + 'dk' => 'da', + 'no' => 'nb', + 'se' => 'sv', + ); + + if (isset($renamed_langcodes[$langcode])) { + $langcode = $renamed_langcodes[$langcode]; + } + // Define full set of translatable strings in English $PHPMAILER_LANG = array( 'authenticate' => 'SMTP Error: Could not authenticate.', @@ -1625,6 +1775,10 @@ class PHPMailer // Calculate an absolute path so it can work if CWD is not here $lang_path = dirname(__FILE__). DIRECTORY_SEPARATOR . 'language'. DIRECTORY_SEPARATOR; } + //Validate $langcode + if (!preg_match('/^[a-z]{2}(?:_[a-zA-Z]{2})?$/', $langcode)) { + $langcode = 'en'; + } $foundlang = true; $lang_file = $lang_path . 'phpmailer.lang-' . $langcode . '.php'; // There is no English translation file @@ -1918,7 +2072,9 @@ class PHPMailer $result .= $this->headerLine('Subject', $this->encodeHeader($this->secureHeader($this->Subject))); } - if ($this->MessageID != '') { + // Only allow a custom message ID if it conforms to RFC 5322 section 3.6.4 + // https://tools.ietf.org/html/rfc5322#section-3.6.4 + if ('' != $this->MessageID and preg_match('/^<.*@.*>$/', $this->MessageID)) { $this->lastMessageID = $this->MessageID; } else { $this->lastMessageID = sprintf('<%s@%s>', $this->uniqueid, $this->serverHostname()); @@ -2020,7 +2176,15 @@ class PHPMailer */ public function getSentMIMEMessage() { - return $this->MIMEHeader . $this->mailHeader . self::CRLF . $this->MIMEBody; + return rtrim($this->MIMEHeader . $this->mailHeader, "\n\r") . self::CRLF . self::CRLF . $this->MIMEBody; + } + + /** + * Create unique ID + * @return string + */ + protected function generateId() { + return md5(uniqid(time())); } /** @@ -2034,7 +2198,7 @@ class PHPMailer { $body = ''; //Create unique IDs and preset boundaries - $this->uniqueid = md5(uniqid(time())); + $this->uniqueid = $this->generateId(); $this->boundary[1] = 'b1_' . $this->uniqueid; $this->boundary[2] = 'b2_' . $this->uniqueid; $this->boundary[3] = 'b3_' . $this->uniqueid; @@ -2050,11 +2214,12 @@ class PHPMailer //Can we do a 7-bit downgrade? if ($bodyEncoding == '8bit' and !$this->has8bitChars($this->Body)) { $bodyEncoding = '7bit'; + //All ISO 8859, Windows codepage and UTF-8 charsets are ascii compatible up to 7-bit $bodyCharSet = 'us-ascii'; } - //If lines are too long, change to quoted-printable transfer encoding - if (self::hasLineLongerThanMax($this->Body)) { - $this->Encoding = 'quoted-printable'; + //If lines are too long, and we're not already using an encoding that will shorten them, + //change to quoted-printable transfer encoding for the body part only + if ('base64' != $this->Encoding and self::hasLineLongerThanMax($this->Body)) { $bodyEncoding = 'quoted-printable'; } @@ -2063,10 +2228,12 @@ class PHPMailer //Can we do a 7-bit downgrade? if ($altBodyEncoding == '8bit' and !$this->has8bitChars($this->AltBody)) { $altBodyEncoding = '7bit'; + //All ISO 8859, Windows codepage and UTF-8 charsets are ascii compatible up to 7-bit $altBodyCharSet = 'us-ascii'; } - //If lines are too long, change to quoted-printable transfer encoding - if (self::hasLineLongerThanMax($this->AltBody)) { + //If lines are too long, and we're not already using an encoding that will shorten them, + //change to quoted-printable transfer encoding for the alt body part only + if ('base64' != $altBodyEncoding and self::hasLineLongerThanMax($this->AltBody)) { $altBodyEncoding = 'quoted-printable'; } //Use this as a preamble in all multipart message types @@ -2169,8 +2336,10 @@ class PHPMailer $body .= $this->attachAll('attachment', $this->boundary[1]); break; default: - // catch case 'plain' and case '' - $body .= $this->encodeString($this->Body, $bodyEncoding); + // Catch case 'plain' and case '', applies to simple `text/plain` and `text/html` body content types + //Reset the `Encoding` property in case we changed it for line length reasons + $this->Encoding = $bodyEncoding; + $body .= $this->encodeString($this->Body, $this->Encoding); break; } @@ -2276,8 +2445,7 @@ class PHPMailer /** * Set the message type. - * PHPMailer only supports some preset message types, - * not arbitrary MIME structures. + * PHPMailer only supports some preset message types, not arbitrary MIME structures. * @access protected * @return void */ @@ -2295,6 +2463,7 @@ class PHPMailer } $this->message_type = implode('_', $type); if ($this->message_type == '') { + //The 'plain' message_type refers to the message having a single body element, not that it is plain-text $this->message_type = 'plain'; } } @@ -2324,6 +2493,7 @@ class PHPMailer /** * Add an attachment from a path on the filesystem. + * Never use a user-supplied path to a file! * Returns false if the file could not be found or read. * @param string $path Path to the attachment. * @param string $name Overrides the attachment name. @@ -2849,6 +3019,7 @@ class PHPMailer * displayed inline with the message, not just attached for download. * This is used in HTML messages that embed the images * the HTML refers to using the $cid value. + * Never use a user-supplied path to a file! * @param string $path Path to the attachment. * @param string $cid Content ID of the attachment; Use this to reference * the content when using an embedded image in HTML. @@ -3209,21 +3380,29 @@ class PHPMailer } /** - * Create a message from an HTML string. - * Automatically makes modifications for inline images and backgrounds - * and creates a plain-text version by converting the HTML. - * Overwrites any existing values in $this->Body and $this->AltBody + * Create a message body from an HTML string. + * Automatically inlines images and creates a plain-text version by converting the HTML, + * overwriting any existing values in Body and AltBody. + * Do not source $message content from user input! + * $basedir is prepended when handling relative URLs, e.g.

and must not be empty + * will look for an image file in $basedir/images/a.png and convert it to inline. + * If you don't provide a $basedir, relative paths will be left untouched (and thus probably break in email) + * If you don't want to apply these transformations to your HTML, just set Body and AltBody directly. * @access public * @param string $message HTML message string - * @param string $basedir baseline directory for path + * @param string $basedir Absolute path to a base directory to prepend to relative paths to images * @param boolean|callable $advanced Whether to use the internal HTML to text converter * or your own custom converter @see PHPMailer::html2text() - * @return string $message + * @return string $message The transformed message Body */ public function msgHTML($message, $basedir = '', $advanced = false) { preg_match_all('/(src|background)=["\'](.*)["\']/Ui', $message, $images); if (array_key_exists(2, $images)) { + if (strlen($basedir) > 1 && substr($basedir, -1) != '/') { + // Ensure $basedir has a trailing / + $basedir .= '/'; + } foreach ($images[2] as $imgindex => $url) { // Convert data URIs into embedded images if (preg_match('#^data:(image[^;,]*)(;base64)?,#', $url, $match)) { @@ -3241,18 +3420,24 @@ class PHPMailer $message ); } - } elseif (substr($url, 0, 4) !== 'cid:' && !preg_match('#^[A-z]+://#', $url)) { - // Do not change urls for absolute images (thanks to corvuscorax) + continue; + } + if ( + // Only process relative URLs if a basedir is provided (i.e. no absolute local paths) + !empty($basedir) + // Ignore URLs containing parent dir traversal (..) + && (strpos($url, '..') === false) // Do not change urls that are already inline images + && substr($url, 0, 4) !== 'cid:' + // Do not change absolute URLs, including anonymous protocol + && !preg_match('#^[a-z][a-z0-9+.-]*:?//#i', $url) + ) { $filename = basename($url); $directory = dirname($url); if ($directory == '.') { $directory = ''; } $cid = md5($url) . '@phpmailer.0'; // RFC2392 S 2 - if (strlen($basedir) > 1 && substr($basedir, -1) != '/') { - $basedir .= '/'; - } if (strlen($directory) > 1 && substr($directory, -1) != '/') { $directory .= '/'; } @@ -3277,7 +3462,7 @@ class PHPMailer // Convert all message body line breaks to CRLF, makes quoted-printable encoding work much better $this->Body = $this->normalizeBreaks($message); $this->AltBody = $this->normalizeBreaks($this->html2text($message, $advanced)); - if (empty($this->AltBody)) { + if (!$this->alternativeExists()) { $this->AltBody = 'To view this email message, open it in a program that understands HTML!' . self::CRLF . self::CRLF; } @@ -3288,7 +3473,7 @@ class PHPMailer * Convert an HTML string into plain text. * This is used by msgHTML(). * Note - older versions of this function used a bundled advanced converter - * which was been removed for license reasons in #232 + * which was been removed for license reasons in #232. * Example usage: *


      * // Use default conversion
@@ -3588,7 +3773,7 @@ class PHPMailer
      * @access public
      * @param string $signHeader
      * @throws phpmailerException
-     * @return string
+     * @return string The DKIM signature value
      */
     public function DKIM_Sign($signHeader)
     {
@@ -3598,15 +3783,35 @@ class PHPMailer
             }
             return '';
         }
-        $privKeyStr = file_get_contents($this->DKIM_private);
-        if ($this->DKIM_passphrase != '') {
+        $privKeyStr = !empty($this->DKIM_private_string) ? $this->DKIM_private_string : file_get_contents($this->DKIM_private);
+        if ('' != $this->DKIM_passphrase) {
             $privKey = openssl_pkey_get_private($privKeyStr, $this->DKIM_passphrase);
         } else {
-            $privKey = $privKeyStr;
+            $privKey = openssl_pkey_get_private($privKeyStr);
         }
-        if (openssl_sign($signHeader, $signature, $privKey)) {
-            return base64_encode($signature);
+        //Workaround for missing digest algorithms in old PHP & OpenSSL versions
+        //@link http://stackoverflow.com/a/11117338/333340
+        if (version_compare(PHP_VERSION, '5.3.0') >= 0 and
+            in_array('sha256WithRSAEncryption', openssl_get_md_methods(true))) {
+            if (openssl_sign($signHeader, $signature, $privKey, 'sha256WithRSAEncryption')) {
+                openssl_pkey_free($privKey);
+                return base64_encode($signature);
+            }
+        } else {
+            $pinfo = openssl_pkey_get_details($privKey);
+            $hash = hash('sha256', $signHeader);
+            //'Magic' constant for SHA256 from RFC3447
+            //@link https://tools.ietf.org/html/rfc3447#page-43
+            $t = '3031300d060960864801650304020105000420' . $hash;
+            $pslen = $pinfo['bits'] / 8 - (strlen($t) / 2 + 3);
+            $eb = pack('H*', '0001' . str_repeat('FF', $pslen) . '00' . $t);
+
+            if (openssl_private_encrypt($eb, $signature, $privKey, OPENSSL_NO_PADDING)) {
+                openssl_pkey_free($privKey);
+                return base64_encode($signature);
+            }
         }
+        openssl_pkey_free($privKey);
         return '';
     }
 
@@ -3623,7 +3828,7 @@ class PHPMailer
         foreach ($lines as $key => $line) {
             list($heading, $value) = explode(':', $line, 2);
             $heading = strtolower($heading);
-            $value = preg_replace('/\s+/', ' ', $value); // Compress useless spaces
+            $value = preg_replace('/\s{2,}/', ' ', $value); // Compress useless spaces
             $lines[$key] = $heading . ':' . trim($value); // Don't forget to remove WSP around the value
         }
         $signHeader = implode("\r\n", $lines);
@@ -3661,7 +3866,7 @@ class PHPMailer
      */
     public function DKIM_Add($headers_line, $subject, $body)
     {
-        $DKIMsignatureType = 'rsa-sha1'; // Signature & hash algorithms
+        $DKIMsignatureType = 'rsa-sha256'; // Signature & hash algorithms
         $DKIMcanonicalization = 'relaxed/simple'; // Canonicalization of header/body
         $DKIMquery = 'dns/txt'; // Query method
         $DKIMtime = time(); // Signature Timestamp = seconds since 00:00:00 - Jan 1, 1970 (UTC time zone)
@@ -3669,6 +3874,7 @@ class PHPMailer
         $headers = explode($this->LE, $headers_line);
         $from_header = '';
         $to_header = '';
+        $date_header = '';
         $current = '';
         foreach ($headers as $header) {
             if (strpos($header, 'From:') === 0) {
@@ -3677,6 +3883,9 @@ class PHPMailer
             } elseif (strpos($header, 'To:') === 0) {
                 $to_header = $header;
                 $current = 'to_header';
+            } elseif (strpos($header, 'Date:') === 0) {
+                $date_header = $header;
+                $current = 'date_header';
             } else {
                 if (!empty($$current) && strpos($header, ' =?') === 0) {
                     $$current .= $header;
@@ -3687,6 +3896,7 @@ class PHPMailer
         }
         $from = str_replace('|', '=7C', $this->DKIM_QP($from_header));
         $to = str_replace('|', '=7C', $this->DKIM_QP($to_header));
+        $date = str_replace('|', '=7C', $this->DKIM_QP($date_header));
         $subject = str_replace(
             '|',
             '=7C',
@@ -3694,7 +3904,7 @@ class PHPMailer
         ); // Copied header fields (dkim-quoted-printable)
         $body = $this->DKIM_BodyC($body);
         $DKIMlen = strlen($body); // Length of body
-        $DKIMb64 = base64_encode(pack('H*', sha1($body))); // Base64 of packed binary SHA-1 hash of body
+        $DKIMb64 = base64_encode(pack('H*', hash('sha256', $body))); // Base64 of packed binary SHA-256 hash of body
         if ('' == $this->DKIM_identity) {
             $ident = '';
         } else {
@@ -3707,16 +3917,18 @@ class PHPMailer
             $this->DKIM_selector .
             ";\r\n" .
             "\tt=" . $DKIMtime . '; c=' . $DKIMcanonicalization . ";\r\n" .
-            "\th=From:To:Subject;\r\n" .
+            "\th=From:To:Date:Subject;\r\n" .
             "\td=" . $this->DKIM_domain . ';' . $ident . "\r\n" .
             "\tz=$from\r\n" .
             "\t|$to\r\n" .
+            "\t|$date\r\n" .
             "\t|$subject;\r\n" .
             "\tbh=" . $DKIMb64 . ";\r\n" .
             "\tb=";
         $toSign = $this->DKIM_HeaderC(
             $from_header . "\r\n" .
             $to_header . "\r\n" .
+            $date_header . "\r\n" .
             $subject_header . "\r\n" .
             $dkimhdrs
         );
diff --git a/wp-includes/class-requests.php b/wp-includes/class-requests.php
index 5a6257a8..bb266189 100644
--- a/wp-includes/class-requests.php
+++ b/wp-includes/class-requests.php
@@ -749,15 +749,17 @@ class Requests {
 	 * @return string Decoded body
 	 */
 	protected static function decode_chunked($data) {
-		if (!preg_match('/^([0-9a-f]+)[^\r\n]*\r\n/i', trim($data))) {
+		if (!preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', trim($data))) {
 			return $data;
 		}
 
+
+
 		$decoded = '';
 		$encoded = $data;
 
 		while (true) {
-			$is_chunked = (bool) preg_match('/^([0-9a-f]+)[^\r\n]*\r\n/i', $encoded, $matches);
+			$is_chunked = (bool) preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', $encoded, $matches);
 			if (!$is_chunked) {
 				// Looks like it's not chunked after all
 				return $data;
diff --git a/wp-includes/class-smtp.php b/wp-includes/class-smtp.php
index f17ca0fd..3ad08192 100644
--- a/wp-includes/class-smtp.php
+++ b/wp-includes/class-smtp.php
@@ -30,7 +30,7 @@ class SMTP
      * The PHPMailer SMTP version number.
      * @var string
      */
-    const VERSION = '5.2.14';
+    const VERSION = '5.2.22';
 
     /**
      * SMTP line break constant.
@@ -81,7 +81,7 @@ class SMTP
      * @deprecated Use the `VERSION` constant instead
      * @see SMTP::VERSION
      */
-    public $Version = '5.2.14';
+    public $Version = '5.2.22';
 
     /**
      * SMTP server port number.
@@ -150,6 +150,17 @@ class SMTP
      */
     public $Timelimit = 300;
 
+	/**
+	 * @var array patterns to extract smtp transaction id from smtp reply
+	 * Only first capture group will be use, use non-capturing group to deal with it
+	 * Extend this class to override this property to fulfil your needs.
+	 */
+	protected $smtp_transaction_id_patterns = array(
+		'exim' => '/[0-9]{3} OK id=(.*)/',
+		'sendmail' => '/[0-9]{3} 2.0.0 (.*) Message/',
+		'postfix' => '/[0-9]{3} 2.0.0 Ok: queued as (.*)/'
+	);
+
     /**
      * The socket for the server connection.
      * @var resource
@@ -206,7 +217,7 @@ class SMTP
         }
         //Avoid clash with built-in function names
         if (!in_array($this->Debugoutput, array('error_log', 'html', 'echo')) and is_callable($this->Debugoutput)) {
-            call_user_func($this->Debugoutput, $str, $this->do_debug);
+            call_user_func($this->Debugoutput, $str, $level);
             return;
         }
         switch ($this->Debugoutput) {
@@ -272,8 +283,8 @@ class SMTP
         $errstr = '';
         if ($streamok) {
             $socket_context = stream_context_create($options);
-            //Suppress errors; connection failures are handled at a higher level
-            $this->smtp_conn = @stream_socket_client(
+            set_error_handler(array($this, 'errorHandler'));
+            $this->smtp_conn = stream_socket_client(
                 $host . ":" . $port,
                 $errno,
                 $errstr,
@@ -281,12 +292,14 @@ class SMTP
                 STREAM_CLIENT_CONNECT,
                 $socket_context
             );
+            restore_error_handler();
         } else {
             //Fall back to fsockopen which should work in more places, but is missing some features
             $this->edebug(
                 "Connection: stream_socket_client not available, falling back to fsockopen",
                 self::DEBUG_CONNECTION
             );
+            set_error_handler(array($this, 'errorHandler'));
             $this->smtp_conn = fsockopen(
                 $host,
                 $port,
@@ -294,6 +307,7 @@ class SMTP
                 $errstr,
                 $timeout
             );
+            restore_error_handler();
         }
         // Verify we connected properly
         if (!is_resource($this->smtp_conn)) {
@@ -336,11 +350,22 @@ class SMTP
         if (!$this->sendCommand('STARTTLS', 'STARTTLS', 220)) {
             return false;
         }
+
+        //Allow the best TLS version(s) we can
+        $crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT;
+
+        //PHP 5.6.7 dropped inclusion of TLS 1.1 and 1.2 in STREAM_CRYPTO_METHOD_TLS_CLIENT
+        //so add them back in manually if we can
+        if (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) {
+            $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;
+            $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT;
+        }
+
         // Begin encrypted connection
         if (!stream_socket_enable_crypto(
             $this->smtp_conn,
             true,
-            STREAM_CRYPTO_METHOD_TLS_CLIENT
+            $crypto_method
         )) {
             return false;
         }
@@ -353,7 +378,7 @@ class SMTP
      * @see hello()
      * @param string $username The user name
      * @param string $password The password
-     * @param string $authtype The auth type (PLAIN, LOGIN, NTLM, CRAM-MD5, XOAUTH2)
+     * @param string $authtype The auth type (PLAIN, LOGIN, CRAM-MD5)
      * @param string $realm The auth realm for NTLM
      * @param string $workstation The auth workstation for NTLM
      * @param null|OAuth $OAuth An optional OAuth instance (@see PHPMailerOAuth)
@@ -389,7 +414,7 @@ class SMTP
             );
 
             if (empty($authtype)) {
-                foreach (array('LOGIN', 'CRAM-MD5', 'PLAIN') as $method) {
+                foreach (array('CRAM-MD5', 'LOGIN', 'PLAIN') as $method) {
                     if (in_array($method, $this->server_caps['AUTH'])) {
                         $authtype = $method;
                         break;
@@ -673,7 +698,7 @@ class SMTP
     protected function parseHelloFields($type)
     {
         $this->server_caps = array();
-        $lines = explode("\n", $this->last_reply);
+        $lines = explode("\n", $this->helo_rply);
 
         foreach ($lines as $n => $s) {
             //First 4 chars contain response code followed by - or space
@@ -1115,4 +1140,47 @@ class SMTP
     {
         return $this->Timeout;
     }
+
+    /**
+     * Reports an error number and string.
+     * @param integer $errno The error number returned by PHP.
+     * @param string $errmsg The error message returned by PHP.
+     */
+    protected function errorHandler($errno, $errmsg)
+    {
+        $notice = 'Connection: Failed to connect to server.';
+        $this->setError(
+            $notice,
+            $errno,
+            $errmsg
+        );
+        $this->edebug(
+            $notice . ' Error number ' . $errno . '. "Error notice: ' . $errmsg,
+            self::DEBUG_CONNECTION
+        );
+    }
+
+	/**
+	 * Will return the ID of the last smtp transaction based on a list of patterns provided
+	 * in SMTP::$smtp_transaction_id_patterns.
+	 * If no reply has been received yet, it will return null.
+	 * If no pattern has been matched, it will return false.
+	 * @return bool|null|string
+	 */
+	public function getLastTransactionID()
+	{
+		$reply = $this->getLastReply();
+
+		if (empty($reply)) {
+			return null;
+		}
+
+		foreach($this->smtp_transaction_id_patterns as $smtp_transaction_id_pattern) {
+			if(preg_match($smtp_transaction_id_pattern, $reply, $matches)) {
+				return $matches[1];
+			}
+		}
+
+		return false;
+    }
 }
diff --git a/wp-includes/class-wp-theme.php b/wp-includes/class-wp-theme.php
index 40af39df..35c56503 100644
--- a/wp-includes/class-wp-theme.php
+++ b/wp-includes/class-wp-theme.php
@@ -720,8 +720,9 @@ final class WP_Theme implements ArrayAccess {
 	private function markup_header( $header, $value, $translate ) {
 		switch ( $header ) {
 			case 'Name' :
-				if ( empty( $value ) )
-					$value = $this->get_stylesheet();
+				if ( empty( $value ) ) {
+					$value = esc_html( $this->get_stylesheet() );
+				}
 				break;
 			case 'Description' :
 				$value = wptexturize( $value );
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index ff09f345..e3c92949 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -2234,7 +2234,7 @@ function wp_check_filetype( $filename, $mimes = null ) {
  * If it's determined that the extension does not match the file's real type,
  * then the "proper_filename" value will be set with a proper filename and extension.
  *
- * Currently this function only supports validating images known to getimagesize().
+ * Currently this function only supports renaming images validated via wp_get_image_mime().
  *
  * @since 3.0.0
  *
@@ -2258,14 +2258,15 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 		return compact( 'ext', 'type', 'proper_filename' );
 	}
 
-	// We're able to validate images using GD
-	if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
+	// Validate image types.
+	if ( $type && 0 === strpos( $type, 'image/' ) ) {
 
 		// Attempt to figure out what type of image it actually is
-		$imgstats = @getimagesize( $file );
+		$real_mime = wp_get_image_mime( $file );
 
-		// If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
-		if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
+		if ( ! $real_mime ) {
+			$type = $ext = false;
+		} elseif ( $real_mime != $type ) {
 			/**
 			 * Filters the list mapping image mime types to their respective extensions.
 			 *
@@ -2282,10 +2283,10 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 			) );
 
 			// Replace whatever is after the last period in the filename with the correct extension
-			if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
+			if ( ! empty( $mime_to_ext[ $real_mime ] ) ) {
 				$filename_parts = explode( '.', $filename );
 				array_pop( $filename_parts );
-				$filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
+				$filename_parts[] = $mime_to_ext[ $real_mime ];
 				$new_filename = implode( '.', $filename_parts );
 
 				if ( $new_filename != $filename ) {
@@ -2295,8 +2296,20 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 				$wp_filetype = wp_check_filetype( $new_filename, $mimes );
 				$ext = $wp_filetype['ext'];
 				$type = $wp_filetype['type'];
+			} else {
+				$type = $ext = false;
 			}
 		}
+	} elseif ( function_exists( 'finfo_file' ) ) {
+		// Use finfo_file if available to validate non-image files.
+		$finfo = finfo_open( FILEINFO_MIME_TYPE );
+		$real_mime = finfo_file( $finfo, $file );
+		finfo_close( $finfo );
+
+		// If the extension does not match the file's real type, return false.
+		if ( $real_mime !== $type ) {
+			$type = $ext = false;
+		}
 	}
 
 	/**
@@ -2314,6 +2327,38 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 	return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
 }
 
+/**
+ * Returns the real mime type of an image file.
+ *
+ * This depends on exif_imagetype() or getimagesize() to determine real mime types.
+ *
+ * @since 4.7.1
+ *
+ * @param string $file Full path to the file.
+ * @return string|false The actual mime type or false if the type cannot be determined.
+ */
+function wp_get_image_mime( $file ) {
+	/*
+	 * Use exif_imagetype() to check the mimetype if available or fall back to
+	 * getimagesize() if exif isn't avaialbe. If either function throws an Exception
+	 * we assume the file could not be validated.
+	 */
+	try {
+		if ( is_callable( 'exif_imagetype' ) ) {
+			$mime = image_type_to_mime_type( exif_imagetype( $file ) );
+		} elseif ( function_exists( 'getimagesize' ) ) {
+			$imagesize = getimagesize( $file );
+			$mime = ( isset( $imagesize['mime'] ) ) ? $imagesize['mime'] : false;
+		} else {
+			$mime = false;
+		}
+	} catch ( Exception $e ) {
+		$mime = false;
+	}
+
+	return $mime;
+}
+
 /**
  * Retrieve list of mime types and file extensions.
  *
diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index a253a61d..3f5ee2c9 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -669,7 +669,7 @@ function wpmu_validate_blog_signup( $blogname, $blog_title, $user = '' ) {
 function wpmu_signup_blog( $domain, $path, $title, $user, $user_email, $meta = array() )  {
 	global $wpdb;
 
-	$key = substr( md5( time() . rand() . $domain ), 0, 16 );
+	$key = substr( md5( time() . wp_rand() . $domain ), 0, 16 );
 	$meta = serialize($meta);
 
 	$wpdb->insert( $wpdb->signups, array(
@@ -719,7 +719,7 @@ function wpmu_signup_user( $user, $user_email, $meta = array() ) {
 	// Format data
 	$user = preg_replace( '/\s+/', '', sanitize_user( $user, true ) );
 	$user_email = sanitize_email( $user_email );
-	$key = substr( md5( time() . rand() . $user_email ), 0, 16 );
+	$key = substr( md5( time() . wp_rand() . $user_email ), 0, 16 );
 	$meta = serialize($meta);
 
 	$wpdb->insert( $wpdb->signups, array(
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 1517156c..8c11d3ea 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6.1';
+$wp_version = '4.6.2';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index 8ebee4c4..8057bcc0 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -779,6 +779,11 @@ class wpdb {
 			$charset = 'utf8mb4';
 		}
 
+		if ( 'utf8mb4' === $charset && ! $this->has_cap( 'utf8mb4' ) ) {
+			$charset = 'utf8';
+			$collate = str_replace( 'utf8mb4_', 'utf8_', $collate );
+		}
+
 		if ( 'utf8mb4' === $charset ) {
 			// _general_ is outdated, so we can upgrade it to _unicode_, instead.
 			if ( ! $collate || 'utf8_general_ci' === $collate ) {
diff --git a/wp-mail.php b/wp-mail.php
index 62c9a119..b5af05ab 100644
--- a/wp-mail.php
+++ b/wp-mail.php
@@ -14,6 +14,12 @@ require(dirname(__FILE__) . '/wp-load.php');
 if ( ! apply_filters( 'enable_post_by_email_configuration', true ) )
 	wp_die( __( 'This action has been disabled by the administrator.' ) );
 
+$mailserver_url = get_option( 'mailserver_url' );
+
+if ( 'mail.example.com' === $mailserver_url || empty( $mailserver_url ) ) {
+	wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
+}
+
 /**
  * Fires to allow a plugin to do a complete takeover of Post by Email.
  *
-- 
2.44.0

- Version 4.6.1 + Version 4.6.2

-
Version 4.6.1 +
Version 4.6.2