mlf-xss.txt

`my little forum Cross-site scripting  
-----------------------------------------------------------  
  
Product: my little forum  
Version: 2.0 (beta 23), 1.75  
Vendor: http://mylittleforum.net/  
Date: 02/11/08  
  
- Introduction  
  
"my little forum is a simple PHP and MySQL based web-forum that displays  
the messages in classical threaded view."  
  
- Details  
  
my little forum contains a flaw that allows a remote persistent cross site  
scripting attack. The application does not validate [img] BBCode tags when  
a user submits a forum post. This could be used to post javascript code  
to the forum. IE6 and below will execute scripts stored in the src attribute  
of an image element. IE7 and FireFox are not vulnerable.  
  
- Proof of Concept  
  
[img]javascript:alert(document.cookie)[/img]  
which is converted to  
<img src="javascript:alert(document.cookie)" alt="[image]" />  
  
- Solution  
  
Author was notified of security issue (2/4). Upgrade to 2.0 beta 24 or  
disable the ability to use the [img] BBCode tag in your forum.  
  
Author: dB  
Email: dB [at] rawsecurity.org  
  
  
`