CVE-2011-5132
Cross-site scripting (XSS) vulnerability in MyBB before 1.6.5 allows remote attackers to inject arbitrary web script or HTML via vectors related to "usernames via AJAX."
Date published : 2012-08-30
http://www.securityfocus.com/bid/50816
MyBB 1.6.5 Released – Feature Update, Security & Maintenance Release