Update: I hope to have this out by the end of this week (2021-07-02) before the WMF takes its summer refresh/vacation break the following week.

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Subject: MediaWiki Extensions and Skins Security Release Supplement (1.31.15/1.35.3/1.36.1)

Greetings-

With the security/maintenance release of MediaWiki 1.31.15/1.35.3/1.36.1 [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]:

== SocialProfile ==
+ (T281043, CVE-2021-36130) - Stored XSS in various SystemGifts-related special pages
< https://gerrit.wikimedia.org/r/q/Id915eba45497a1a0dc1c4e00818a2fd4c0ce55d3 >

== SportsTeams ==
+ (T281196, CVE-2021-36131) - Stored XSS in SportsTeams' Special:SportsTeamsManager & Special:UpdateFavoriteTeams
< https://gerrit.wikimedia.org/r/691913 >

== FileImporter ==
+ (T280590, CVE-2021-36132) - Special:ImportFile does not check permissions from own config FileImporterRequiredRight
< https://gerrit.wikimedia.org/r/q/I8ff2a67abd2c118a3469e4410eac2a451bfa76c3 >

== ManageWiki ==
+ (T281417, CVE-2021-29483) - 'wikiconfig' API leaked private config variables
< https://github.com/miraheze/ManageWiki/security/advisories/GHSA-jmc9-rv2f-g8vv >

== CentralAuth ==
+ (T260865, CVE-2021-36125) - Very long usernames can cause an infinite loop when loading Special:GlobalRenameRequest
< https://gerrit.wikimedia.org/r/q/I97d8b3236b5abed8ba9a9c4d3ab5050c2e782c22 >
+ (T281972, CVE-2021-36128) - Disable autoblocks for CentralAuth-issued suppression blocks
< https://gerrit.wikimedia.org/r/q/I15d14c88a1e30df92c470bc191c4ee573172d4d1 >
+ (T285190, CVE-2021-36127) - Special:GlobalUserRights reveals existence of globally suppressed users
< https://gerrit.wikimedia.org/r/q/I4e4dbcad61e1d4f6fd8b038bf63d19c69081a8ec >

== Translate ==
+ (T282932, CVE-2021-36129) - Aggregategroups Action API module allows deleting translatable page metadata for any group without trace
< https://gerrit.wikimedia.org/r/q/I3619a7e88c2eb979babb7b027d4fdbfabc0af792 >

== AbuseFilter ==
+ (T284364, CVE-2021-36126) - Bad english MediaWiki:Abusefilter-blocker breaks filters
< https://gerrit.wikimedia.org/r/q/I9e9f44b7663e810de70fb9ac7f6760f83dd4895b >

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].

[0] https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/YR3X4L2CPSEJVSY543AWEO65TD6APXHP/
[1] https://phabricator.wikimedia.org/T279733
[2] https://www.mediawiki.org/wiki/Version_lifecycle
[3] https://www.mediawiki.org/wiki/Reporting_security_bugs

In T279733#7194995, @sbassett wrote:

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Subject: MediaWiki Extensions and Skins Security Release Supplement (1.31.15/1.35.3/1.36.1)

I see that there are three different section headings for CentralAuth - can they be combined?

In T279733#7194999, @DannyS712 wrote:

I see that there are three different section headings for CentralAuth - can they be combined?

Sure, see above.