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WordPress User Submitted Posts 20151113 Cross Site Scripting

WordPress User Submitted Posts 20151113 Cross Site Scripting
Posted Feb 25, 2016
Authored by panVagenas

WordPress User Submitted Posts plugin version 20151113 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
MD5 | ba780ecc5b2e194667d2507d7336287b

WordPress User Submitted Posts 20151113 Cross Site Scripting

Change Mirror Download
* Exploit Title: WordPress User Submitted Posts Plugin [Persistent XSS]
* Discovery Date: 2016-02-10
* Exploit Author: Panagiotis Vagenas
* Author Link: https://twitter.com/panVagenas
* Vendor Homepage: https://plugin-planet.com/
* Software Link: https://wordpress.org/plugins/user-submitted-posts/
* Version: 20151113
* Tested on: WordPress 4.4.2
* Category: WebApps, WordPress


Description
-----------

_User Submitted Posts_ plugin for WordPress suffers from a XSS
vulnerability. The `user-submitted-content` field of the new post
submission form is not properly sanitized, thus allowing users to
include JS code to submitted post content.

Normally only users with `unfiltered_html` capability are allowed to
include JS code to post content. By default Administrators or Super
Administrators have this capability, so this is considered as Persistent
XSS vulnerability.

PoC
---

1. Submit the form inserting JS code to post content
2. View the newly created post
3. JS code is executed

Solution
--------

Upgrade to v20160215

Timeline
--------

1. **2016-02-10**: Vendor notified via contact form at his website
2. **2016-02-10**: Vendor responded and received details about the issue
3. **2016-02-14**: Vendor released version 20160215


User Submitted Posts [Persistent XSS].md

* Exploit Title: User Submitted Posts [Persistent XSS]
* Discovery Date: 2016-02-10
* Exploit Author: Panagiotis Vagenas
* Author Link: https://twitter.com/panVagenas
* Vendor Homepage: https://plugin-planet.com/
* Software Link: https://wordpress.org/plugins/user-submitted-posts/
* Version: 20151113
* Tested on: WordPress 4.4.2
* Category: WebApps, WordPress


Description
-----------

_User Submitted Posts_ plugin for WordPress suffers from a XSS
vulnerability. The `user-submitted-content` field of the new post
submission form is not properly sanitized, thus allowing users to
include JS code to submitted post content.

Normally only users with `unfiltered_html` capability are allowed to
include JS code to post content. By default Administrators or Super
Administrators have this capability, so this is considered as Persistent
XSS vulnerability.

PoC
---

1. Submit the form inserting JS code to post content
2. View the newly created post
3. JS code is executed

Solution
--------

Upgrade to v20160215

Timeline
--------

1. **2016-02-10**: Vendor notified via contact form at his website
2. **2016-02-10**: Vendor responded and received details about the issue
3. **2016-02-14**: Vendor released version 20160215

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