Cross-site scripting (XSS) vulnerability in post.php in NavBoard V16 Stable(2.6.0) and V17beta2 allows remote attackers to inject arbitrary web script or HTML via the (1) b, (2) textlarge, and (3) url bbcode tags.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24021
http://www.vupen.com/english/advisories/2006/0092
http://www.securityfocus.com/bid/16165
http://www.securityfocus.com/archive/1/421149/100/0/threaded