MyBB OUGC Feedback Plugin 1.8.22 – Cross-Site Scripting
# Exploit Title: MyBB OUGC Feedback Plugin 1.8.22 - Cross-Site Scripting # Date: 1/30/2021 # Author: 0xB9 # Twitter: @0xB9Sec # Contact: 0xB9[at]pm.me # Software Link: https://community.mybb.com/mods.php?action=view&pid=1220 # Version: 1.8.22 # Tested on: Windows 10 # CVE: CVE-2021-28115 1. Description: This plugin adds a feedback system to your forum. Edit feedback button is vulnerable to XSS. 2. Proof of Concept: - Go to a user profile - Add feedback and leave the following payload as comment "><script>alert(1)</script> - View the feedback feedback.php?uid=2 - When clicking Edit payload will execute |