Multiple cross-site scripting (XSS) vulnerabilities in templates/2k11/admin/overview.inc.tpl in Serendipity before 2.0-rc2 allow remote attackers to inject arbitrary web script or HTML via a blog comment in the QUERY_STRING to serendipity/index.php.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.