Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.5.12 allow remote attackers to inject arbitrary web script or HTML via the HTTP_REFERER header to (1) components/com_content/views/article/tmpl/form.php, (2) components/com_user/controller.php, (3) plugins/system/legacy/html.php, or (4) templates/beez/html/com_content/article/form.php.
http://www.securityfocus.com/bid/35544
http://www.openwall.com/lists/oss-security/2011/12/25/8
http://www.openwall.com/lists/oss-security/2011/12/25/3