Reflected XSS in AVideo via videoEmbeded.php Link Parameter

Executive Summary

AVideo has a reflected cross-site scripting (XSS) vulnerability in videoEmbeded.php. The link parameter is echoed inside an HTML comment without proper escaping. Attackers can inject malicious JavaScript by closing the comment and adding their own code, which executes when victims visit a specially crafted embed URL.

Useful 0 Not Useful 0

Detection Guidance

To detect this reflected XSS vulnerability in AVideo, inspect HTTP requests to videoEmbeded.php for the 'link' parameter. Look for URLs containing JavaScript code or attempts to close HTML comments with '-->'. Use tools like Burp Suite or OWASP ZAP to intercept and analyze requests for malicious payloads.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability allows attackers to execute arbitrary JavaScript in the context of a victim's browser when they visit a malicious embed URL. This could lead to theft of session cookies, account takeover, or delivery of malware. Users interacting with compromised videos are at risk.

Useful 0 Not Useful 0

Compliance Impact

This XSS vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements for protected health information. Organizations using AVideo may face compliance violations if user data is compromised through this flaw.

Useful 0 Not Useful 0

Mitigation Strategies

Immediately update AVideo to the latest commit (c91b5975d or later) which patches the reflected XSS issue. If an update is not available, implement input validation to sanitize the 'link' parameter and ensure proper output escaping in videoEmbeded.php to prevent script injection.

Useful 0 Not Useful 0