CVE-2025-43921
First published: Sun Apr 20 2025(Updated: )
GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to create lists via the /mailman/create endpoint.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| cPanel GNU Mailman | ||
| cPanel GNU Mailman | >=2.1.1<=2.1.39 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-43921?
CVE-2025-43921 is a high-severity vulnerability that allows unauthenticated attackers to create email lists.
How do I fix CVE-2025-43921?
To mitigate CVE-2025-43921, you should upgrade to the latest version of GNU Mailman that addresses this vulnerability.
What versions of GNU Mailman are affected by CVE-2025-43921?
CVE-2025-43921 specifically affects GNU Mailman version 2.1.39 and earlier versions deployed in certain configurations.
What impact does CVE-2025-43921 have on my server?
This vulnerability can lead to unauthorized list creation, which could result in spam distribution or further exploitation.
Is CVE-2025-43921 exploit publicly known?
Yes, CVE-2025-43921 is a public vulnerability, and proof-of-concept exploits are available, making it critical to apply patches immediately.
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