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Debian LTS Advisory DLA-2847-1                [email protected]
https://www.debian.org/lts/security/                   Moritz Muehlenhoff
December 15, 2021                             https://wiki.debian.org/LTS
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Package        : mediawiki
Version        : 1:1.27.7-1+deb9u11
CVE ID         : CVE-2021-44858

A security issue was discovered in MediaWiki, a website engine for
collaborative work: Missing validation in the mcrundo action may allow
allow an attacker to leak page content from private wikis or to bypass
edit restrictions.

For additional information please refer to

For Debian 9 stretch, this problem has been fixed in version

We recommend that you upgrade your mediawiki packages.

For the detailed security status of mediawiki 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