Cross-site scripting (XSS) vulnerability in Invision Power Board (IPB) 2.1.6 and earlier allows remote attackers to inject arbitrary web script or HTML via a POST that contains hexadecimal-encoded HTML.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27701
http://www.vupen.com/english/advisories/2006/2481
http://www.securityfocus.com/bid/18571
http://securityreason.com/securityalert/596