GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to execute arbitrary OS commands via shell metacharacters in an email Subject line.
https://github.com/0NYX-MY7H/CVE-2025-43920
https://code.launchpad.net/~mailman-coders/mailman/2.1
Source: Mitre, NVD
Published: 2025-04-20
Updated: 2025-04-20
Base Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 5.4
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N