Greetings-

With the security/maintenance release of MediaWiki 1.31.6/1.32.6/1.33.2 [0], we would also like to provide this supplementary announcement of MediaWiki extensions and skins with now-public Phabricator tasks, security patches and backports [1]:

== CheckUser == + (T234862, CVE-2019-18611) - Do not show oversighted edit summaries in CheckUser API https://gerrit.wikimedia.org/r/q/Ie0aa0df2b3f03d8b910733f1b5e600a0dc978765

== AbuseFilter == + (T104807, CVE-2019-18612) - Older hidden versions of a currently-public AbuseFilter are exposed via diffs https://gerrit.wikimedia.org/r/q/Ie23e8234ae550273bf3f6f9c5ac45b7fc54eec2a

+ (T237887, CVE-2019-18987) - Old public versions of private filters are publicly viewable https://gerrit.wikimedia.org/r/q/Ic12790bd33982473f77551bde9599ed083a3e1f1

== VisualEditor == + (T239209, CVE-2019-19708) - XSS in Visual Editor via Copy&Paste https://gerrit.wikimedia.org/r/q/I1f99458fd2c4f6b2460dfe7a93b330ddee4400b6

== MinervaNeue skin == + (T240487, CVE requested) - XSS in MinervaNeue skin https://gerrit.wikimedia.org/r/q/Ida471291f1698387a26736931ab17e6899e05b51

== LDAPAuthentication2 == + (T240338, No CVE requested) - LDAPAuthentication2 allows login with invalid password https://gerrit.wikimedia.org/r/q/I7b125ab468ebc914b8a1c67ed0c03e3c2a20c6cd

The Wikimedia Security Team recommends updating these extensions and 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].

[0] https://lists.wikimedia.org/pipermail/wikitech-l/2019-December/092886.html [1] https://phabricator.wikimedia.org/T234983 [2] https://www.mediawiki.org/wiki/Version_lifecycle [3] https://www.mediawiki.org/wiki/Reporting_security_bugs