Unspecified vulnerability in Citrix Presentation Server 4.5 and earlier, Citrix Access Essentials 2.0 and earlier, and Citrix Desktop Server 1.0 allows remote authenticated users to access unauthorized desktops via unknown attack vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/42439
http://www.vupen.com/english/advisories/2008/1530/references
http://www.securitytracker.com/id?1020027
http://www.securityfocus.com/bid/29232