CVE-2025-43921

MEDIUM EPSS 29.8%
Published Apr 20, 20251y ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Apr 20, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
29.8% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

Affected Products 1

VendorProductVersionRange
gnumailman*≥2.1.1  –  ≤2.1.39

References 4

  • code.launchpad.net https://code.launchpad.net/~mailman-coders/mailman/2.1
    Product
  • github.com https://github.com/0NYX-MY7H/CVE-2025-43921
    ExploitThird Party Advisory
  • github.com https://github.com/cpanel/mailman2-python3
  • openwall.com https://www.openwall.com/lists/oss-security/2025/04/21/6

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.