Vanilla Forums 2.0.18.4 - Tagging Persistent Cross-Site Scripting

Author: Henry Hoggard
type: webapps
platform: php
port: 
date_added: 2012-06-03 
date_updated: 2012-08-13 
verified: 1 
codes: OSVDB-82529 
tags: 
aliases:  
screenshot_url:  
application_url: http://www.exploit-db.comvanilla-core-2-0-18-4.zip

# Title: Vanilla Tagging Stored XSS
# Date: 1/6/12
# Author: Henry Hoggard
# Author URL: henryhoggard.co.uk
# Author Twitter: @henryhoggard
# Software: Vanilla Version 2.0.18.4
# http://vanillaforums.org/download

Create a new thread and post your XSS as tag. I used
<script>alert('xss')</script>

You will have to use a proxy / manipulate the form to bypass the max-length on the form.

Once you have posted the thread, send an administrator or moderator to

http://server/index.php?p=/vanilla/post/editdiscussion/7

Where 7 is the thread ID of the thread you just made. The XSS will then trigger.
You can even use a URL shortener to send the link.

Note: The URL may be different depending on what category your thread is in.

#############################################################