Vulnerability Details : CVE-2021-3603
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.
Vulnerability category: File inclusion
Products affected by CVE-2021-3603
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:a:phpmailer_project:phpmailer:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3603
0.49%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 64 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3603
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
NIST | |
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
huntr.dev |
CWE ids for CVE-2021-3603
-
The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.Assigned by:
- nvd@nist.gov (Primary)
- security@huntr.dev (Secondary)
References for CVE-2021-3603
-
https://github.com/PHPMailer/PHPMailer/commit/45f3c18dc6a2de1cb1bf49b9b249a9ee36a5f7f3
Deny string-based callables altogether · PHPMailer/PHPMailer@45f3c18 · GitHubPatch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YRMWGA4VTMXFB22KICMB7YMFZNFV3EJ/
[SECURITY] Fedora 33 Update: php-phpmailer6-6.5.0-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FJYSOFCUBS67J3TKR74SD3C454N7VTYM/
[SECURITY] Fedora 34 Update: php-phpmailer6-6.5.0-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://www.huntr.dev/bounties/1-PHPMailer/PHPMailer/
huntr: Inclusion of Functionality from Untrusted Control Sphere PHP Vulnerability in PHPMailerProduct
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