{"id":"BIT-phpmailer-2021-3603","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.","aliases":["CVE-2021-3603","GHSA-77mr-wc79-m8j3"],"modified":"2026-09-08T08:47:46.689403626Z","published":"2024-03-06T11:01:27.687Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:phpmailer_project:phpmailer:*:*:*:*:*:*:*:*"]},"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"}],"affected":[{"package":{"name":"phpmailer","ecosystem":"Bitnami","purl":"pkg:bitnami/phpmailer"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"6.4.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/phpmailer/BIT-phpmailer-2021-3603.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}],"schema_version":"1.9.0"}