source: https://www.securityfocus.com/bid/32780/info

Microsoft Internet Explorer is a web browser for the Microsoft Windows operating system.

Internet Explorer 8 includes a cross-site-scripting filter that is designed to prevent cross-site-scripting attacks against vulnerable web applications. Attackers may be able to bypass this filter under certain conditions, such as by taking advantage of an existing vulnerability in a web application.

Internet Explorer 8 beta 2 is vulnerable. 

} BODY{a:expression(alert(&#039;hi&#039;))};</style>***<style>***