Multiple cross-site scripting (XSS) vulnerabilities in concrete5 5.7.2.1, 5.7.2, and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) gName parameter in single_pages/dashboard/users/groups/bulkupdate.php or (2) instance_id parameter in tools/dashboard/sitemap_drag_request.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/99264
http://www.securityfocus.com/archive/1/534189/100/0/threaded