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CVE-2025-43919

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

Published
Last modified
published
Not listed in CISA KEV
2 proofs of concept on GitHub
  • Exploitation: poc
  • Automatable: yes
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • GNU Mailman

    2.1.39

References 5

code.launchpad.net

GitHub · 0NYX-MY7H/CVE-2025-43919

GitHub · cpanel/mailman2-python3

openwall.com

GitHub · cybersecplayground/CVE-2025-43919-POC