CVE-2025-43921
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| GNU | Mailman | 2.1.39 | affected |
Weaknesses
- CWE-863: CWE-863 Incorrect Authorization
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
References
- https://code.launchpad.net/~mailman-coders/mailman/2.1
- https://github.com/0NYX-MY7H/CVE-2025-43921
- https://github.com/cpanel/mailman2-python3
- https://www.openwall.com/lists/oss-security/2025/04/21/6
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