Multiple cross-site scripting (XSS) vulnerabilities in PhpGuestbook.php in PhpGuestbook 1.0 allow remote attackers to inject arbitrary web script or HTML via the (1) Name, (2) Website, and (3) Comment parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25850
http://www.vupen.com/english/advisories/2006/1422
http://www.securityfocus.com/bid/17594
http://www.securityfocus.com/bid/17537
http://www.securityfocus.com/archive/1/431070/100/0/threaded
http://secunia.com/advisories/19669
http://pridels0.blogspot.com/2006/04/phpguestbook-v10-script-insertion.html