CVE-2025-43921: 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…

medium5.3CVSS 3.1

AVNACLPRNUINSUCNILAN

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
gnu	mailman	—	—
gnu	mailman	2.1.1 – 2.1.39	—

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

osv5.3MEDIUM