CVE-2025-43921

State: Published
Severity: 5.3 Medium
Published: Apr 20, 2025
Updated: Apr 28, 2025
Reserved: Apr 19, 2025

Description

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to create lists via the /mailman/create endpoint. NOTE: multiple third parties report that they are unable to reproduce this, regardless of whether cPanel or WHM is used.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	mitre

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MailmanGNU	2.1.39Affected

References

https://code.launchpad.net/~mailman-coders/mailman/2.1
https://github.com/0NYX-MY7H/CVE-2025-43921
https://github.com/cpanel/mailman2-python3
https://www.openwall.com/lists/oss-security/2025/04/21/6

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