A mailman security update has been released for Debian GNU/Linux 8 LTS to address an arbitrary content injection vulnerability in the Mailman mailing list manager.

DLA 2204-1: mailman security update

Package : mailman
Version : 1:2.1.18-2+deb8u6
CVE ID : CVE-2020-12108

It was discovered that there was an arbitrary content injection
vulnerability in the Mailman mailing list manager.

For Debian 8 "Jessie", this issue has been fixed in mailman version
1:2.1.18-2+deb8u6.

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