Cross-site scripting (XSS) vulnerability in the listonlineusers (aka "Who's online") component in mvnForum before 1.2.1 GA allows remote attackers to inject arbitrary web script or HTML via unspecified parameters.
http://www.securityfocus.com/bid/32605
http://www.securityfocus.com/archive/1/498872/100/0/threaded
http://www.mvnforum.com/mvnforum/viewthread_thread%2C4361
http://securityreason.com/securityalert/4699
http://security.bkis.vn/?p=286