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Inclusion of Functionality from Untrusted Control Sphere

CVE-2021-3603

Severity High
Score 8.1/10

Summary

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 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.

  • HIGH
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

The software imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.

Advisory Timeline

  • Published