Package        : mailman
Version        : 1:2.1.18-2+deb8u4
Debian Bug     : 904680

The security update of mailman announced as DLA-1442-1 introduced a
regression due to an incomplete fix for CVE-2018-13796 that broke the
admin and listinfo overview pages.

For Debian 8 "Jessie", this problem has been fixed in version
1:2.1.18-2+deb8u4.

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