Layerbb 1.1.2 crosssite scripting Vulnerability / Exploit

  /     /     /  

Exploits / Vulnerability Discovered : 2019-02-12 | Type : webapps | Platform : php
This exploit / vulnerability Layerbb 1.1.2 crosssite scripting is for educational purposes only and if it is used you will do on your own risk!

---

[+] Code ...

# Exploit Title: LayerBB 1.1.2 - Cross-Site Scripting
# Date: 11/19/2018
# Author: 0xB9
# Twitter: @0xB9Sec
# Contact: 0xB9[at]pm.me
# Software Link: https://forum.layerbb.com/downloads.php?view=file&id=28
# Version: 1.1.2
# Tested on: Ubuntu 18.04
# CVE: CVE-2019-7688


1. Description:
LayerBB is a free open-source forum software. The 2 XSS's found allows users to input a payload to Custom Profile Fields and the polls question & answers input via a new thread.


2. Proof of Concept:

PoC - Polls QnA
- Start a new thread
- Use a payload in the polls QnA input boxes <script>alert('XSS')</script>
- Anyone who views the thread will execute payload

PoC - Custom Profile Fields
- Create a Custom Profile Field in ACP
- Then use an account from any usergroup & edit profile
- Input a payload in the bottom "Additional Profile Fields" textbox <script>alert('XSS')</script>
- Anyone who views your profile will execute payload



3. Solution:
Update to 1.1.3