Multiple cross-site scripting (XSS) vulnerabilities in WebApp Guestbook PRO 3.2.1 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) title or (2) content of a message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/20544
http://www.securityfocus.com/bid/13593
http://securitytracker.com/id?1013940