Multiple cross-site scripting (XSS) vulnerabilities in register.php in Andy's PHP Knowledgebase (Aphpkb) before 0.95.8 allow remote attackers to inject arbitrary web script or HTML via the (1) first_name, (2) last_name, (3) email, or (4) username parameter.
http://sourceforge.net/p/aphpkb/code/91
http://secunia.com/advisories/56228
http://aphpkb.blogspot.dk/2013/12/release-of-aphpkb-0958.html