CVE-2025-43920

HIGH EPSS 38.6%
Published Apr 20, 20251y ago · Modified Jun 17, 20262w ago
8.1 CVSS 3.1
High
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), in certain external archiver configurations, allows unauthenticated attackers to execute arbitrary OS commands via shell metacharacters in an email Subject line. NOTE: multiple third parties report that they are unable to reproduce this, regardless of whether cPanel or WHM is used.

CVSS Details

Base Score
8.1
Exploitability
2.2
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
38.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-78 OS Command Injection Injection

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-2025-43920
    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.