Greetings-
With the security/maintenance release of MediaWiki 1.35.9/1.38.4/1.39.1, we would also like to provide this supplementary announcement of MediaWiki extensions and skins with now-public Phabricator tasks, security patches and backports [1]:
+ (T311337, CVE-2022-39193) - Edits with the performer suppressed still show the performer in results from the CheckUser extension
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/879167/
+ (T316414, CVE-2022-39193) - Special:Investigate can expose supressed information in check results
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/879166/
+ (T318166, CVE-2022-39193) - CheckUser API can expose the suppressed performer
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/879073/
+ (T321733, CVE-2023-22945) - Action=growthmanagementorlist makes it possible for blocked users to enroll as mentors
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/857629/
+ (T315123, CVE-2023-22912) - CheckUser TokenManager insecurely uses AES-CTR encryption with repeated nonce, allowing an adversary to decrypt
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/879074/
+ (T320987, CVE-2023-22909) - Mobile frontend's history makes really slow db queries
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/MobileFrontend/+/857762/
+ (T149488, CVE-2023-22911) - Widgets does widget replacement in html attributes potentially leading to XSS
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Widgets/+/856035/
+ (T323592, CVE-2023-22910) - XSS in Wikibase date formatting
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/879171/
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/T318974
[2] https://www.mediawiki.org/wiki/Version_lifecycle
[3] https://www.mediawiki.org/wiki/Reporting_security_bugs