MyBB Latest Posts On Profile 1.1 Cross Site Scripting

`# Exploit Title: MyBB Latest Posts on Profile Plugin v1.1 - Cross-Site Scripting  
# Date: 4/20/2018  
# Author: 0xB9  
# Contact: luxorforums.com/User-0xB9 or 0xB9[at]pm.me  
# Software Link: https://community.mybb.com/mods.php?action=view&pid=914  
# Version: 1.1  
# Tested on: Ubuntu 17.10  
# CVE: CVE-2018-10580  
  
  
1. Description:  
Adds a new section to user profiles that will display their last posts.  
  
  
2. Proof of Concept:  
  
Persistent XSS  
- Create a thread with the following subject <script>alert('XSS')</script>  
- Now visit your profile to see the alert.  
  
  
3. Solution:  
I reported the plugin twice over the past 3 weeks and recieved no response.  
  
  
The following should be added in line 236 to properly sanitize thread subjects.  
  
$d['tsubject'] = htmlspecialchars_uni($d['tsubject']);  
  
  
`