mailman is vulnerable to cross-site scripting (XSS). A listowner
is able to inject and execute arbitrary Javascripts in a user’s browser via the listinfo
pages.
jvn.jp/en/jp/JVN00846677/index.html
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
lists.debian.org/debian-lts-announce/2018/07/msg00034.html
mail.python.org/pipermail/mailman-announce/2018-June/000236.html
security.gentoo.org/glsa/201904-10
usn.ubuntu.com/4348-1/
www.debian.org/security/2018/dsa-4246