source: https://www.securityfocus.com/bid/6253/info

The ext.dll ISAPI does not sufficiently sanitize user-supplied input when processing search queries. This may allow an attacker to create a custom URL containing script code that, when viewed in a browser by a legitimate user, will result in the execution of the script code. 

');alert(document.cookie);//
')" style="left:expression(eval('alert(document.cookie)'))">