Release Notes: Several bugs have been fixed.
Release Notes: A cross-site scripting (XSS) vulnerability was fixed. Fatal errors with unusual file repository configurations, such as ForeignAPIRepo were fixed. The "change password" link on Special:Preferences was changed to have the correct returnto parameter.
Release Notes: XSS and CSRF vulnerabilities were fixed.
Release Notes: An XSS vulnerability has been fixed.
Release Notes: 59,000 new localised text messages have been added, taking the total to 266,000, spread across 281 languages. New special pages: FileDuplicateSearch and ListGroupRights. Special:UserRights and Special:SpecialPages have been redesigned. You can hide categories with __HIDDENCAT__. Image redirects are now enabled by default. Search results show image thumbnails. The search box in the MonoBook sidebar can be moved up by editing [[MediaWiki:Sidebar]]. Double redirects created by a page move can be fixed automatically. There are many other changes.