Cross-site scripting (XSS) vulnerability in inc/functions_post.php in MyBB (aka MyBulletinBoard) 1.10 allows remote attackers to inject arbitrary web script or HTML via a JavaScript event in a BBCode email tag, as demonstrated using the onmousemove event.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25615
http://www.vupen.com/english/advisories/2006/1216
http://www.securityfocus.com/bid/17368
http://www.securityfocus.com/archive/1/429748/100/0/threaded