Cross-site scripting (XSS) vulnerability in messages.php in XennoBB 1.0.5 and earlier allows remote attackers to inject arbitrary web script or HTML via the tid parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27367
http://www.vupen.com/english/advisories/2006/2510
http://www.securityfocus.com/bid/18652