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Mailman CVE-2025-43920

MEDIUM
OS Command Injection (CWE-78)
2025-04-20 cve@mitre.org
Command Injection Mailman Suse
5.4
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.4 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
SUSE
MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Patch released
Apr 06, 2026 - 08:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 18:37 vuln.today
PoC Detected
Apr 28, 2025 - 14:15 vuln.today
Public exploit code
CVE Published
Apr 20, 2025 - 01:15 nvd
MEDIUM 5.4

DescriptionCVE.org

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.

AnalysisAI

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. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. 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. Affected products include: Gnu Mailman.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Server 12 SP5 Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security Fixed
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed
SUSE Linux Enterprise Point of Sale 11 SP3 Fixed

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CVE-2025-43920 vulnerability details – vuln.today
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