# Exploit Title: MyBB [PGM] Favicon Plugin 1.0 – Cross-Site Scripting # Date: May 2, 2023 # Author: 0xB9 # Twitter: @0xB9sec # Software Link: https://community.mybb.com/mods.php?action=view&pid=1554 # Version: 1.0 # Tested On: Windows 10 Description: The favicon input in the settings doesn’t sanitize the favicon URL. Proof of Concept: – In the admin dashboard go to Configuration > Settings > Favicon – Enter the following payload in the URL input: “><script>alert(1)</script>.ico – Visit any page on the forum to trigger the payload