Cross-site scripting (XSS) vulnerability in logout.php in SimpleSAMLphp 1.8.1 and possibly other versions before 1.8.2 allows remote attackers to inject arbitrary web script or HTML via the link_href parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/72313
http://www.securityfocus.com/bid/51372
http://www.openwall.com/lists/oss-security/2012/01/20/20