Debian: DLA-3049-1 Critical Mailman Update: User Impersonation Risk

CVE-2021-43331

A crafted URL to the Cgi/options.py user options page can execute
arbitrary JavaScript for XSS. (Closes: #1000367)

CVE-2021-43332

The CSRF token for the Cgi/admindb.py admindb page contains an
encrypted version of the list admin password. This could
potentially be cracked by a moderator via an offline brute-force
attack.

CVE-2021-44227

A list member or moderator can get a CSRF token and craft an admin
request (using that token) to set a new admin password or make
other changes.

For Debian 9 stretch, these problems have been fixed in version
1:2.1.23-1+deb9u8.

We recommend that you upgrade your mailman packages.

For the detailed security status of mailman please refer to
its security tracker page at:


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