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CVE-2025-43919

HighPublished

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to read arbitrary files via ../ directory traversal at...

Published: Apr 20, 2025
Updated: Apr 28, 2025
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

1.4%

Low · next 30 days

Percentile: 70.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-43919Exploit
Demonstrates CVE-2025-43919, an unauthenticated directory traversal in GNU Mailman 2.1.39 that allows reading arbitrary server files through the /mailman/private/mailman endpoint.
CVE-2025-43919-POCPoC
A new vulnerability has been discovered in GNU Mailman 2.1.39, bundled with cPanel/WHM, allowing unauthenticated remote attackers to read arbitrary files on the server via a directory traversal flaw.

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