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 secur...@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.



[0] 
https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/QEN3EK4JXAVJMJ5GF3GYOAKNJPEKFQYA/

[1] https://phabricator.wikimedia.org/T292236

[2] https://www.mediawiki.org/wiki/Version_lifecycle

[3] https://www.mediawiki.org/wiki/Reporting_security_bugs

[4] https://phabricator.wikimedia.org/T290808

[5] https://phabricator.wikimedia.org/T277353
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