Vulnerability from bitnami_vulndb
Published
2024-03-06 11:01
Modified
2026-09-08 08:34
Summary
Inclusion of Functionality from Untrusted Control Sphere in PHPMailer/PHPMailer
Details

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.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "phpmailer",
        "purl": "pkg:bitnami/phpmailer"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.4.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-3603"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:phpmailer_project:phpmailer:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "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\u0027s scope by other means). If the $patternselect parameter to validateAddress() is set to \u0027php\u0027 (the default, defined by PHPMailer::$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.",
  "id": "BIT-phpmailer-2021-3603",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2024-03-06T11:01:27.687Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/PHPMailer/PHPMailer/commit/45f3c18dc6a2de1cb1bf49b9b249a9ee36a5f7f3"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YRMWGA4VTMXFB22KICMB7YMFZNFV3EJ/"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJYSOFCUBS67J3TKR74SD3C454N7VTYM/"
    },
    {
      "type": "WEB",
      "url": "https://www.huntr.dev/bounties/1-PHPMailer/PHPMailer/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3603"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Inclusion of Functionality from Untrusted Control Sphere in PHPMailer/PHPMailer"
}



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