Greetings-

With the security/maintenance release of MediaWiki 1.35.12/1.39.5/1.40.1, we would also like to provide this supplementary announcement of MediaWiki extensions and skins with now-public Phabricator tasks, security patches and backports [1]:

EntitySchema + (T339016, CVE-2023-45368) - EntitySchema edits don't run through AbuseFilter https://gerrit.wikimedia.org/r/q/Id71ece831c929fadb1710634de9a7be5f02e0b0e

Wikibase + (T333980, CVE-2023-45366) - FederatedPropertiesError shows label as unescaped HTML https://gerrit.wikimedia.org/r/q/I76b953be86d6465ee7355c0a189c68cf20457786

Citoid + (T340200, CVE-2023-45365) - i18n XSS in Citoid Wikibase module https://gerrit.wikimedia.org/r/q/I570e00e45f8a36fbf2b26db9610fa0a702a28f67

CheckUser + (T344923, CVE-2023-45367) - User can store arbitrary number of rows in cu_useragent_clienthints https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/952482/

SportsTeams + (T345040, CVE-2023-45374) - SportsTeams: no anti-CSRF check in Special:SportsTeamsManager and Special:UpdateFavoriteTeams https://gerrit.wikimedia.org/r/c/mediawiki/extensions/SportsTeams/+/952552

Wikibase + (T345064, CVE-2023-45371) - Merging items is not rate limited and only partially protected by AbuseFilter https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/961264/

ProofreadPage + (T345693, CVE-2023-45373) - ProofreadPage Security-XSS errors in CI https://gerrit.wikimedia.org/r/c/mediawiki/extensions/ProofreadPage/+/961262...

PageTriage + (T344359, CVE-2023-45369) - pagetriagelist API leaks suppressed usernames https://gerrit.wikimedia.org/r/c/mediawiki/extensions/PageTriage/+/960676/

SportsTeam + (T345680, CVE-2023-45370) - SportsTeams: Special:SportsManagerLogo and Special:SportsTeamsManagerLogo should check for the "sportsteamsmanager" user right https://gerrit.wikimedia.org/r/c/mediawiki/extensions/SportsTeams/+/959699/

The Wikimedia Security Team recommends updating these extensions and/or skins to the current master branch or relevant, supported release branch [2] as soon as possible. Some of the referenced Phabricator tasks above _may_ still be private. Unfortunately, when security issues are reported, sometimes sensitive information is exposed and since Phabricator is historical, we cannot make these tasks public without exposing this sensitive information. If you have any additional questions or concerns regarding this update, please feel free to contact security@wikimedia.org or file a security task within Phabricator [3].

[1] https://phabricator.wikimedia.org/T340874 [2] https://www.mediawiki.org/wiki/Version_lifecycle [3] https://www.mediawiki.org/wiki/Reporting_security_bugs