A mailman security update has been released for Debian GNU/Linux 8 LTS to address an arbitrary content injection via the Cgi/private.py private archive login page.

DLA 2265-1: mailman security update

Package : mailman
Version : 1:2.1.18-2+deb8u7
CVE ID : CVE-2020-15011
Debian Bug :

GNU Mailman allowed arbitrary content injection via the Cgi/private.py
private archive login page.

For Debian 8 "Jessie", this problem has been fixed in version
1:2.1.18-2+deb8u7.

We recommend that you upgrade your mailman packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS