Unspecified vulnerability in EPiServer CMS 5 and 6 through 6R2, in certain configurations using Forms Authentication, allows remote authenticated users to obtain WebAdmins access by leveraging Edit Mode privileges, a different vulnerability than CVE-2011-3416 and CVE-2011-3417.
http://www.securityfocus.com/bid/51877
http://world.episerver.com/Blogs/Shahid-Nawaz/Dates/2012/1/General-Hotfix-CMS-6-R2/