A mediawiki security update has been released for Debian GNU/Linux 10 to address multiple security issues.

DSA 4767-1: mediawiki security update

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Debian Security Advisory DSA-4767-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
September 25, 2020   https://www.debian.org/security/faq
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Package : mediawiki
CVE ID : CVE-2020-15005 CVE-2020-25812 CVE-2020-25813 CVE-2020-25814
CVE-2020-25815 CVE-2020-25827 CVE-2020-25828

Multiple security issues were discovered in MediaWiki, a website engine
for collaborative work: SpecialUserRights could leak whether a user
existed or not, multiple code paths lacked HTML sanitisation allowing
for cross-site scripting and TOTP validation applied insufficient rate
limiting against brute force attempts.

For the stable distribution (buster), these problems have been fixed in
version 1:1.31.10-1~deb10u1.

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/