CVE-2025-43920HIGH 8.1EPSS p37.2%

CVE-2025-43920CVE-2025-43920

Description

GNU Mailman 2.1.39, as bundled in cPanel (and WHM), in certain external archiver configurations, allows unauthenticated attackers to execute arbitrary OS commands via shell metacharacters in an email Subject line. NOTE: multiple third parties report that they are unable to reproduce this, regardless of whether cPanel or WHM is used.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.47% probability of exploitation · percentile 37.2% · 2026-06-18T12:00:27Z
Published2025-04-20
Last modified2025-04-28

Underlying weaknesses· 1

CWE-78

References

  1. https://code.launchpad.net/~mailman-coders/mailman/2.1
  2. https://github.com/0NYX-MY7H/CVE-2025-43920
  3. https://github.com/cpanel/mailman2-python3
  4. https://www.openwall.com/lists/oss-security/2025/04/21/6

1

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Special Elements used in an OS Command ('OS Command Injection')cwe-780%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.