CVE-2023-48728
📋 TL;DR
This is a stored cross-site scripting (XSS) vulnerability in WWBN AVideo's getOpenGraph videoName functionality that allows attackers to inject malicious JavaScript. When exploited, it enables arbitrary code execution in victims' browsers when they view manipulated content. This affects all users of vulnerable WWBN AVideo installations.
💻 Affected Systems
- WWBN AVideo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on visitors' systems.
Likely Case
Session hijacking, credential theft, defacement of video pages, or redirection to phishing sites.
If Mitigated
Limited impact if proper Content Security Policy (CSP) headers are implemented and input validation is enforced.
🎯 Exploit Status
Exploitation requires user interaction (visiting a malicious page) but the vulnerability itself is unauthenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for latest patched version
Vendor Advisory: https://github.com/WWBN/AVideo
Restart Required: No
Instructions:
1. Update to the latest version of AVideo
2. Apply vendor-provided patches for the getOpenGraph functionality
3. Verify input sanitization is properly implemented
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to web server config: Content-Security-Policy: default-src 'self'; script-src 'self'
Input Validation Filter
allAdd server-side validation for videoName parameter
Implement input sanitization in getOpenGraph function to strip/escape HTML/JS
🧯 If You Can't Patch
- Implement WAF rules to block XSS payloads in videoName parameter
- Disable or restrict the vulnerable functionality if not essential
🔍 How to Verify
Check if Vulnerable:
Test by injecting XSS payload into videoName parameter and checking if it executesCheck Version:
Check AVideo version in admin panel or via version fileVerify Fix Applied:
Test with same XSS payloads to confirm they are properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual characters in videoName parameter
- Multiple failed XSS attempts
- Suspicious referrer headers
Network Indicators:
- HTTP requests with script tags in parameters
- Unusual outbound connections after page load
SIEM Query:
web_requests WHERE parameter CONTAINS '<script>' OR parameter CONTAINS 'javascript:'