MyBB New Threads Plugin 1.1 - Cross-Site Scripting

# Exploit Title: MyBB New Threads Plugin - Cross-Site Scripting
# Date: 7/16/2018
# Author: 0xB9
# Twitter: @0xB9Sec
# Contact: 0xB9[at]pm.me
# Software Link: https://community.mybb.com/mods.php?action=view&pid=1143
# Version: 1.1
# Tested on: Ubuntu 18.04
# CVE: CVE-2018-14392


1. Description:
New Threads is a plugin that displays new threads on the index page. The thread titles allow XSS.
 

2. Proof of Concept:

- Create a new thread with the following subject  <script>alert('XSS')</script>
- Visit the index page to see alert.


3. Solution:
Update to 1.2