CVE-2025-43919

7.5 highEPSS 1.4%

High (7.5) in gnu mailman. EPSS 1.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWEs: CWE-22, CWE-24
Published: 2025-04-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gnu:mailman

References

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

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