https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2021-3603.htmlhttps://patchthecve.com/cve/CVE-2021-3603.htmlWed, 17 Jun 2026 04:05:25 +0000HIGH 8.1: PHPMailer 6.4.1 and earlier contain a vulnerability that can result in untrusted code being called (if such code is injected into the host project's scope by other means). If the $patternselect parameter to validateAddress() is set to 'php' (the default, defined by PHPMailer::$validator), and the glhttps://patchthecve.com/cve/CVE-2021-34551.htmlhttps://patchthecve.com/cve/CVE-2021-34551.htmlWed, 17 Jun 2026 03:56:06 +0000HIGH 8.1: PHPMailer before 6.5.0 on Windows allows remote code execution if lang_path is untrusted data and has a UNC pathname.https://patchthecve.com/cve/CVE-2020-36326.htmlhttps://patchthecve.com/cve/CVE-2020-36326.htmlWed, 17 Jun 2026 03:15:18 +0000CRITICAL 9.8: PHPMailer 6.1.8 through 6.4.0 allows object injection through Phar Deserialization via addAttachment with a UNC pathname. NOTE: this is similar to CVE-2018-19296, but arose because 6.1.8 fixed a functionality problem in which UNC pathnames were always considered unreadable by PHPMailer, even in safehttps://patchthecve.com/cve/CVE-2020-13625.htmlhttps://patchthecve.com/cve/CVE-2020-13625.htmlWed, 17 Jun 2026 02:53:27 +0000HIGH 7.5: PHPMailer before 6.1.6 contains an output escaping bug when the name of a file attachment contains a double quote character. This can result in the file type being misinterpreted by the receiver or any mail relay processing the message.https://patchthecve.com/cve/CVE-2018-19296.htmlhttps://patchthecve.com/cve/CVE-2018-19296.htmlWed, 17 Jun 2026 01:49:05 +0000HIGH 8.8: PHPMailer before 5.2.27 and 6.x before 6.0.6 is vulnerable to an object injection attack.https://patchthecve.com/cve/CVE-2017-11503.htmlhttps://patchthecve.com/cve/CVE-2017-11503.htmlWed, 17 Jun 2026 01:01:54 +0000MEDIUM 6.1: PHPMailer 5.2.23 has XSS in the "From Email Address" and "To Email Address" fields of code_generator.php.https://patchthecve.com/cve/CVE-2017-5223.htmlhttps://patchthecve.com/cve/CVE-2017-5223.htmlWed, 17 Jun 2026 01:20:11 +0000MEDIUM 5.5: An issue was discovered in PHPMailer before 5.2.22. PHPMailer's msgHTML method applies transformations to an HTML document to make it usable as an email message body. One of the transformations is to convert relative image URLs into attachments using a script-provided base directory. If no base direhttps://patchthecve.com/cve/CVE-2016-10045.htmlhttps://patchthecve.com/cve/CVE-2016-10045.htmlWed, 17 Jun 2026 00:38:57 +0000CRITICAL 9.8: The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code by leveraging improper interaction between the escapeshellarg function and internal escaping performed in the mail function in PHP. NOTE: https://patchthecve.com/cve/CVE-2016-10033.htmlhttps://patchthecve.com/cve/CVE-2016-10033.htmlWed, 17 Jun 2026 00:38:55 +0000CRITICAL 9.8: The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted Sender property.https://patchthecve.com/cve/CVE-2015-8476.htmlhttps://patchthecve.com/cve/CVE-2015-8476.htmlWed, 17 Jun 2026 00:34:38 +0000MEDIUM 5.0: Multiple CRLF injection vulnerabilities in PHPMailer before 5.2.14 allow attackers to inject arbitrary SMTP commands via CRLF sequences in an (1) email address to the validateAddress function in class.phpmailer.php or (2) SMTP command to the sendCommand function in class.smtp.php, a different vulner