Greetings-
With the security/maintenance release of MediaWiki 1.31.4 / 1.32.4 / 1.33.1 [0], we would also like to provide this supplementary announcement of wmf-deployed extensions [1] with now-public security patches and backports [2]:
== MobileFrontend == * (T229541, CVE-2019-14807) - Javascript injection in edit summary on mobile site. https://gerrit.wikimedia.org/r/q/I0cb918f8148d1782882e104d127f08cbfa23e542
* (T230576, CVE-2019-15124) - XSS in edit summary for ex:MobileFrontend Special:Watchlist https://gerrit.wikimedia.org/r/q/If4e91093c676de3391e6dde415c8c91c1f582998
== CheckUser == * (T207094 [task to remain private], CVE-2019-16529) - Oversighted edit summaries still visible in CheckUser results https://gerrit.wikimedia.org/r/q/I3d28bd9f14c1237a34afcd2e4479152f571e29a6
== AbuseFilter == * (T224203 [task to remain private], CVE-2019-16528) - Oversighting the user who performed an edit doesn't hide it from the abuse filter log https://gerrit.wikimedia.org/r/q/If3d3256404d0f3dbde171831937d1a816b3e2734
The Wikimedia Security Team recommends updating these extensions to the current master branch or supported release branches [3] as soon as possible. As you may have noticed, some of the referenced Phabricator tasks above are still 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, please feel free to contact security@wikimedia.org or file a security task within Phabricator.
[0] https://lists.wikimedia.org/pipermail/wikitech-l/2019-October/092656.html [1] https://w.wiki/9hi [2] https://phabricator.wikimedia.org/T232113 [3] https://www.mediawiki.org/wiki/Version_lifecycle