What is CVE-2025-43919?

CVE-2025-43919 is a medium-severity vulnerability in Gnu Mailman, classified under CWE-24. CVSS score: 5.8/10. Published 2025-04-20.

How severe is CVE-2025-43919?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Is CVE-2025-43919 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Gnu Mailman

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 /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: 0.013 (68.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

Affected products

Gnu Mailman — versions 2.1.39

Weakness classification (CWE)

Public proof-of-concept exploits

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory, Mitigation)
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2025-43919?: CVE-2025-43919 is a medium-severity vulnerability in Gnu Mailman, classified under CWE-24. CVSS score: 5.8/10. Published 2025-04-20.
How severe is CVE-2025-43919?: Medium severity. CVSS v3 base score is 5.8 out of 10.
Is CVE-2025-43919 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.