Greetings-
With the security/maintenance release of MediaWiki 1.35.5/1.36.3/1.37.1 [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]:
== Dynamic Page List 3/ DPL3 ==
+ (T292351, CVE-2021-41118) - ReDOS in DPL3
https://github.com/Universal-Omega/DynamicPageList3/security/advisories/GHSA-8f24-q75c-jhf4
== CheckUser ==
+ (T292795, CVE-2021-46150) - XSS Vulnerability in Special:CheckUserLog
https://gerrit.wikimedia.org/r/q/If7cd112e627f47f9aca69b380dde1634bf55f789
== WikibaseMediaInfo ==
+ (T293556, CVE-2021-46146) - Stored XSS via WikibaseMediaInfo caption fields
https://gerrit.wikimedia.org/r/q/I58d37fb59f998f5bec4a018bf9da96a777f8ff78
== UniversalLanguageSelector ==
+ (T293749, CVE-2021-46149) - /w/api.php?action=languagesearch denial of service
https://gerrit.wikimedia.org/r/q/Ide32704cca578b9aecbce34bdcc0ac25c2a09a4d
== SecurePoll ==
+ (T290808, CVE-2021-46148) - Users with no NDA can access confidential information
https://gerrit.wikimedia.org/r/q/Ic7510be487a1bf9215de9ae6cf4a26fad96384c9
== Wikibase ==
+ (T294693, CVE-2021-45473) - XSS on page information Wikibase central description
https://gerrit.wikimedia.org/r/q/I3cd080a1a7dacd7396d37ee0c98cff0b4e241f8d
== FileImporter ==
+ (T296605, CVE-2021-45474) - XSS in Special:ImportFile URL
https://gerrit.wikimedia.org/r/q/Id1c8910aeac5b452fbabeddab70360765518223e
== EntitySchema ==
+ (T296578, CVE-2021-45471) - Globally blocked IPs can edit EntitySchema items
https://gerrit.wikimedia.org/r/q/Iac86cf63bd014ef99e83dccfce9b8942e15d2bf9, https://gerrit.wikimedia.org/r/q/Id9af124427bcd1e85301d2140a38bf47bbc5622c
== Wikibase ==
+ (T297570, CVE-2021-45472) - XSS in Wikibase using formatter URL
https://gerrit.wikimedia.org/r/q/I37ece1dfdc80d38055067c9c4fa73ba591acd8bd
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].
Note: The SecurePoll Extension had other enhancements that were related to the security bug [4] but did not address the security concerns directly. See Phabricator [5] for more information.
[1] https://phabricator.wikimedia.org/T292236
[2] https://www.mediawiki.org/wiki/Version_lifecycle
[3] https://www.mediawiki.org/wiki/Reporting_security_bugs