CVE-2025-43921

PoC —

CVSS 3.1

5.3 medium

EPSS

<1%p37

Published

Apr 20, 2025 (Apr 20, 2025)

Modified

Jun 17, 2026

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.

Vendors: gnu
Products: mailman
Weakness: CWE-863
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.4%)

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