# 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