CVE-2021-3603 Inclusion of Functionality from Untrusted Control Sphere in PHPMailer/PHPMailer

2021-06-1712:09:42

CWE-829

@huntrdev

www.cve.org

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

8.2 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

71.7%

JSON

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.

CNA Affected

[
  {
    "product": "PHPMailer",
    "vendor": "PHPMailer",
    "versions": [
      {
        "lessThan": "6.5.0",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]