MyBB New Threads 1.1 Cross Site Scripting

2018.07.20
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 New Threads Plugin - Cross-Site Scripting # Date: 7/16/2018 # Author: 0xB9 # Twitter: @0xB9Sec # Contact: 0xB9[at]pm.me # Software Link: https://community.mybb.com/mods.php?action=view&pid=1143 # Version: 1.1 # Tested on: Ubuntu 18.04 # CVE: CVE-2018-14392 1. Description: New Threads is a plugin that displays new threads on the index page. The thread titles allow XSS. 2. Proof of Concept: - Create a new thread with the following subject <script>alert('XSS')</script> - Visit the index page to see alert. 3. Solution: Update to 1.2


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