Mailman 2.1.39: dir traversal in /mailman/private/mailman
CVE-2025-43919 Published on April 20, 2025
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.
Weakness Type
Path Traversal: '../filedir'
The software uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "../" sequences that can resolve to a location that is outside of that directory.
Products Associated with CVE-2025-43919
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Affected Versions
GNU Mailman Version 2.1.39 is affected by CVE-2025-43919Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.