Mailman is vulnerable to URL mishandling. The Utils.py:GetPathPieces()
allows attackers to display arbitrary text on trusted sites since it does not correctly handle the URL.
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.8_release_notes/index
access.redhat.com/errata/RHSA-2020:1054
access.redhat.com/security/updates/classification/#moderate
bugs.launchpad.net/mailman/+bug/1780874
lists.debian.org/debian-lts-announce/2018/07/msg00034.html
security.gentoo.org/glsa/201904-10
usn.ubuntu.com/4348-1/
www.mail-archive.com/[email protected]/msg71003.html