MGASA-2021-0477 Updated mediawiki packages fix security vulnerability

XSS vulnerability in Special:Search. CVE-2021-41798 ApiQueryBacklinks can cause a full table scan. CVE-2021-41799 Fix PoolCounter protection of Special:Contributions. CVE-2021-41800 ReplaceText continues performing actions if the user no longer has the correct permission such as by being blocked...

CVE-2021-41799

MediaWiki before 1.36.2 allows a denial of service resource consumption because of lengthy query processing time. ApiQueryBacklinks action=query&list=backlinks can cause a full table scan...

CVE-2021-41799

MediaWiki before 1.36.2 allows a denial of service resource consumption because of lengthy query processing time. ApiQueryBacklinks action=query&list=backlinks can cause a full table scan...