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MyBB 1.8.17 Cross Site Scripting

MyBB 1.8.17 Cross Site Scripting
Posted Sep 12, 2018
Authored by 0xB9

MyBB version 1.8.17 suffers from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2018-15596
SHA-256 | 35e07fd55e065a89b42d193de880d9714d2aebd7854018aa4d64438f15919d8b

MyBB 1.8.17 Cross Site Scripting

Change Mirror Download
# Exploit Title: MyBB 1.8.17 - Cross-Site Scripting
# Date: 2018-08-11
# Author: 0xB9
# Twitter: @0xB9Sec
# Contact: 0xB9[at]pm.me
# Software Link: https://mybb.com/download/
# Version: 1.8.17
# Tested on: Ubuntu 18.04
# CVE: CVE-2018-15596

# 1. Description:
# On the forum RSS Syndication page you can generate a URL for example...
# http://localhost/syndication.php?fid=&type=atom1.0&limit=15, the thread titles on
# those generated links aren't sanitized.

# 2. Proof of Concept:

- Make or find a thread of yours on the RSS feed
- Use this payload as the thread title <a href="//google.com">Cool Thread Title</a>
- View RSS feed with your thread again but with the generated URL and click on your thread
- When the thread is clicked you will be redirected to google.com

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