MyBB Recent Threads 1.0 Cross Site Scripting

2018.06.05

Credit: 0xB9

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2018-11715

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 Recent Threads Plugin v1.0 - Cross-Site Scripting
# Date: 6/2/2018
# Author: 0xB9
# Twitter: @0xB9Sec
# Contact: 0xB9[at]pm.me
# Software Link: https://community.mybb.com/mods.php?action=view&pid=842
# Version: 1.0
# Tested on: Ubuntu 18.04
# CVE: CVE-2018-11715
 
 
1. Description:
Creates a page that shows threads that the user has posted in when they have unread replies.
 
  
 
2. Proof of Concept:
 
- Create or reply to a thread with the following subject  <script>alert('XSS')</script> 
- When someone replies to the thread you will see the alert here /misc.php?action=myrecentthreads
 
 
 
3. Solution:
Update to 1.1

See this note in RAW Version

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MyBB Recent Threads 1.0 Cross Site Scripting

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