# 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-2019-76881. 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 fromany 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