CVE-2012-2747
Unspecified vulnerability in Joomla! 2.5.x before 2.5.5 allows remote attackers to gain privileges via unknown attack vectors related to "Inadequate checking."
Date published : 2012-07-03
http://www.securityfocus.com/bid/54073
http://developer.joomla.org/security/news/470-20120601-core-privilege-escalation