CVE-2025-43919

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to read...

5.8 MediumPublic exploitDisputed

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to read arbitrary files via ../ directory traversal at /mailman/private/mailman (aka the private archive authentication endpoint) via the username parameter. NOTE: multiple third parties report that they are unable to reproduce this, regardless of whether cPanel or WHM is used.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

1.41%Up 1.3 points since Apr 20, 2025

What each source reports

CVE List Score used 5.8

Record: CVE-2025-43919
CVSS 3.1: 5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Weakness: CWE-24
Updated: 2026-11-02

EUVDEUVD-2025-12592 5.8

Record: EUVD-2025-12592
CVSS 3.1: 5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-56r4-vj3r-h3vv 5.8

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to read...

Record: GHSA-56r4-vj3r-h3vv
CVSS 3.1: 5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Weakness: CWE-22, CWE-24
Updated: 2026-11-02

NVD 5.8

Record: CVE-2025-43919
CVSS 3.1: 5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-24, CWE-22
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-43919 5.8

Record: UBUNTU-CVE-2025-43919
CVSS 3.1: 5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

gnu mailman

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	0NYX-MY7H/CVE-2025-43919	2025-04-20
PoC in GitHub	cybersecplayground/CVE-2025-43919-POC	2025-04-22

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-43919 is a medium vulnerability (CVSS 5.8) in Gnu Mailman, published April 20, 2025. Its validity is disputed. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.41%, the 72nd percentile.