MyBB Hide Thread Content 1.0 Information Disclosure

`# Exploit Title: MyBB Hide Thread Content Plugin 1.0 - Information Disclosure  
# Date: 1/27/2021  
# Author: 0xB9  
# Twitter: @0xB9Sec  
# Contact: 0xB9[at]pm.me  
# Software Link: https://community.mybb.com/mods.php?action=view&pid=1430  
# Version: 1.0  
# Tested on: Windows 10  
# CVE: CVE-2021-3337  
  
1. Description:  
This plugin hides thread content until user replies to the thread. The information disclosure is hidden content can be viewed without replying.  
  
2. Proof of Concept:  
  
- Visit a post where content is hidden  
- Click the reply or quote button below  
Thread content will be displayed in the [quote] bracket without needing to reply  
  
`