Arbitrary Code Execution Affecting phpmailer/phpmailer package, versions <6.5.0
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Integrity
High
Availability
High
Threat Intelligence
EPSS
0.34% (72nd
percentile)
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-PHP-PHPMAILERPHPMAILER-1311001
- published 17 Jun 2021
- disclosed 17 Jun 2021
- credit Vikrant Singh Chauhan
Introduced: 17 Jun 2021
CVE-2021-3603 Open this link in a new tabHow to fix?
Upgrade phpmailer/phpmailer to version 6.5.0 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Execution. If the $patternselect parameter to validateAddress() is set to 'php' (the default, defined by PHPMailer::$validator), and the global namespace contains a function called php, it will be called in preference to the built-in validator of the same name. Mitigated in PHPMailer 6.5.0 by denying the use of simple strings as validator function names.