MyBB Upcoming Events 1.32 Cross Site Scripting

2019.03.20
Credit: 0xB9
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

# Exploit Title: MyBB Upcoming Events Plugin 1.32 - Cross-Site Scripting # Date: 3/8/2019 # Author: 0xB9 # Twitter: @0xB9Sec # Contact: 0xB9[at]pm.me # Software Link: https://community.mybb.com/mods.php?action=view&pid=1231 # Version: 1.32 # Tested on: Ubuntu 18.04 # CVE: CVE-2019-9650 1. Description: This plugin shows upcoming calendar events on the forum index and portal page. Event names are vulnerable to XSS. 2. Proof of Concept: - Go to the calander.php page and add a new event - Input a payload for the event name <script>alert('XSS')</script> Payload will be executed on index.php 3. Solution: Update to 1.33


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