Cross-site scripting (XSS) vulnerability in showflat.php in Infopop UBB.Threads before 6.5 allows remote attackers to inject arbitrary web script or HTML via the Cat parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18432
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-2501
http://www.securityfocus.com/bid/11900
http://securitytracker.com/id?1012503
http://secunia.com/advisories/13452
http://archives.neohapsis.com/archives/fulldisclosure/2004-12/0239.html