Multiple cross-site scripting (XSS) vulnerabilities in phpMyChat 0.14.6 allow remote attackers to inject arbitrary web script or HTML via the medium parameter to (1) start_page.css.php and (2) style.css.php; or the From parameter to users_popupL.php.
http://www.securityfocus.com/archive/1/484575/100/0/threaded
http://www.securityfocus.com/archive/1/418397/100/0/threaded