CVE-2012-3828
Cross-site scripting (XSS) vulnerability in Joomla! 2.5.3 allows remote attackers to inject arbitrary web script or HTML via the Host HTTP Header.
Date published : 2012-07-03
http://www.securityfocus.com/bid/53277
http://packetstormsecurity.org/files/112249/Joomla-2.5.3-Host-Header-Cross-Site-Scripting.html