templates.admin.users.user_form_processing in Blue Coat Reporter before 7.1.2 allows authenticated users to gain administrator privileges via an HTTP POST that sets volatile.user.administrator to true.
http://www.vupen.com/english/advisories/2005/0589
http://www.securityfocus.com/bid/13723
http://www.bluecoat.com/support/knowledge/advisory_reporter_711_vulnerabilities.html