Multiple cross-site scripting (XSS) vulnerabilities in SilverStripe CMS & Framework 3.1.13 allow remote attackers to inject arbitrary web script or HTML via the (1) admin_username or (2) admin_password parameter to install.php.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-5079
http://www.securityfocus.com/archive/1/535716/100/0/threaded
http://packetstormsecurity.com/files/132223/SilverStripe-CMS-3.1.13-XSS-Open-Redirect.html
http://hyp3rlinx.altervista.org/advisories/AS-SILVERSTRIPE0607.txt