CSRF Bypass Vulnerability in Mailman Affects Ubuntu 20.04 and 16.04

CSRF Bypass Vulnerability in Mailman Affects Ubuntu 20.04 and 16.04

First seen 3 Mar 2026, 04:10 UTC •UbuntuLinuxsecurity •89% similarity •36.2

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A security vulnerability has been identified in Mailman, affecting Ubuntu 20.04 LTS and 16.04 LTS. The flaw allows a remote list member or moderator to bypass CSRF token protections, enabling them to craft admin requests that could change passwords or make other administrative changes. Users are advised to apply the necessary patches to mitigate this risk.

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Timeline

2021-12-02
CVE-2021-44227 published
2026-03-02
Security issue disclosed affecting Mailman in Ubuntu 20.04 and 16.04
Recent
Patch released to address the CSRF vulnerability

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Ubuntu Mailman