MediaWiki is a Web-based collaborative editing environment. Originally built for the online encyclopedia project Wikipedia, it's geared to support a large number of users and pages.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
An XSS injection vulnerability based on Microsoft
Internet Explorer's UTF-7 charset autodetection
was located in the AJAX support module, affecting
MSIE users on MediaWiki 1.6.x and up when the
optional setting $wgUseAjax is enabled. Minor
compatibility fixes for IIS and PostgreSQL are
also included.
