CVE-2025-43919

Name: CVE-2025-43919
Creator: NVD / NIST
Published: 2025-04-20T01:15:45.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.40%

Last modified Jun 17, 2026

CVE-2025-43919 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.40%

69.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gnu	Mailman	>= 2.1.1, <= 2.1.39

References

https://code.launchpad.net/~mailman-coders/mailman/2.1Product
https://github.com/0NYX-MY7H/CVE-2025-43919Exploit, Mitigation, Third Party Advisory
https://github.com/cpanel/mailman2-python3
https://www.openwall.com/lists/oss-security/2025/04/21/6

Timeline

Published: Apr 20, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-43919?

How severe is CVE-2025-43919?

CVE-2025-43919 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2025-43919?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-43919?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST