========================================================================== Ubuntu Security Notice USN-8067-1 March 02, 2026
mailman vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 16.04 LTS
Summary:
A system hardening measure could be bypassed.
Software Description:
- mailman: Web-based mailing list manager
Details:
It was discovered that Mailman incorrectly handled CSRF tokens. A remote
list member or moderator could possibly use their own token to craft an
admin request CSRF attack and set a new admin password or make other
changes.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
mailman 1:2.1.29-1ubuntu3.1+esm2
Available with Ubuntu Pro
Ubuntu 16.04 LTS
mailman 1:2.1.20-1ubuntu0.6+esm3
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8067-1
CVE-2021-44227
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