Mozilla Firefox 2.0.0.6 and earlier allows remote attackers to spoof the contents of the status bar via a link to a data: URI containing an encoded URL. NOTE: the severity of this issue has been disputed by a reliable third party, since the intended functionality of the status bar allows it to be modified.
http://www.securityfocus.com/archive/1/476062/100/0/threaded
http://www.securityfocus.com/archive/1/475970/100/0/threaded
http://www.securityfocus.com/archive/1/475651/100/0/threaded
http://www.securityfocus.com/archive/1/475531/100/100/threaded
http://www.securityfocus.com/archive/1/475467/100/100/threaded