GNU Mailman Vulnerability in cPanel Allows List Creation by Unauthenticated Attackers
CVE-2025-43921
5.3MEDIUM
Key Information:
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👾 Exploit Exists🟡 Public PoC
What is CVE-2025-43921?
The vulnerability in GNU Mailman version 2.1.39, as packaged with cPanel, exposes an endpoint that allows unauthenticated attackers to create email distribution lists. This poses significant security risks, as it could be exploited to spread spam or malicious content, affecting the integrity and reputation of affected services. Administrators are urged to secure this endpoint to prevent unauthorized list creation.
Affected Version(s)
Mailman 2.1.39
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.