MyBB Bans List 1.0 Cross Site Scripting

2019.02.13
Credit: 0xB9
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 3.5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 6.8/10
Exploit range: Remote
Attack complexity: Medium
Authentication: Single time
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

# Exploit Title: MyBB Bans List - Cross Site Scripting # Date: 7/25/2018 # Author: 0xB9 # Twitter: @0xB9Sec # Contact: 0xB9[at]pm.me # Software Link: https://community.mybb.com/mods.php?action=view&pid=423 # Version: 1.0 # Tested on: Ubuntu 18.04 # CVE: CVE-2018-14724 1. Description: Adds bans.php page, showing a list of banned users and the reason of ban. Any forum user that's a mod can ban users and input a payload into the ban reason which gets executed on the bans.php page. 2. Proof of Concept: - Have a mod account - Ban a user - Input the following for reason of the ban <script>alert('XSS')</script> - Anyone to view page will execute payload


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