Multiple cross-site scripting (XSS) vulnerabilities in eintragen.php in GaesteChaos 0.2 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) gastname or (2) gastwohnort parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28219
http://www.vupen.com/english/advisories/2006/3155
http://www.securityfocus.com/archive/1/442205/100/200/threaded