A mediawiki security update has been released for Debian GNU/Linux 11 to address multiple security issues.

DSA 5246-1: mediawiki security update

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Debian Security Advisory DSA-5246-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
October 04, 2022   https://www.debian.org/security/faq
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Package : mediawiki
CVE ID : CVE-2021-44854 CVE-2021-44855 CVE-2021-44856 CVE-2022-28201
CVE-2022-28202 CVE-2022-28203 CVE-2022-29248 CVE-2022-31042
CVE-2022-31043 CVE-2022-31090 CVE-2022-31091 CVE-2022-34911
CVE-2022-34912 CVE-2022-41765 CVE-2022-41767

Multiple security issues were discovered in MediaWiki, a website engine
for collaborative work, which could result in restriction bypass,
information leaks, cross-site scripting or denial of service.

For the stable distribution (bullseye), these problems have been fixed in
version 1:1.35.8-1~deb11u1.

We recommend that you upgrade your mediawiki packages.

For the detailed security status of mediawiki please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/mediawiki

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