CVE-2025-43921 Information

Description

GNU Mailman 2.1.39 as bundled in cPanel (and WHM) allows unauthenticated attackers to create lists via the /mailman/create endpoint.

Reference

https://code.launchpad.net/~mailman-coders/mailman/2.1 https://github.com/0NYX-MY7H/CVE-2025-43921