0NYX-MY7H/CVE-2025-43921

0NYX-MY7H/CVE-2025-43921

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CVE-2025-43921: Unauthorized Mailing List Creation in GNU Mailman 2.1.39
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CVE History

CVEPublishedCVSS v3CVSS v2
CVE-2025-43921↗
5.3 MEDIUM—

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.