========================================================================== Ubuntu Security Notice USN-5180-1 December 07, 2021 mailman vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 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 18.04 LTS: mailman 1:2.1.26-1ubuntu0.6 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5180-1 CVE-2021-44227 Package Information: https://launchpad.net/ubuntu/+source/mailman/1:2.1.26-1ubuntu0.6