Stored XSS in Jivejdon via Malicious File Upload

Executive Summary

This vulnerability is a stored cross-site scripting (XSS) flaw in Jivejdon version 5.0 or earlier. It allows authenticated attackers to inject malicious JavaScript by uploading files with a manipulated Content-Type header, such as declaring the file as text/html. When users view these attachments via UploadShowAction, the JavaScript executes in their browser within the application's domain.

Useful 0 Not Useful 0

Detection Guidance

To detect this vulnerability, inspect uploaded files for incorrect Content-Type headers. Check if files are served with text/html instead of their actual type. Review server logs for suspicious file uploads and verify if UploadShowAction serves files inline without proper validation.

Useful 0 Not Useful 0

Impact Analysis

If you are a user of a vulnerable Jivejdon instance, an attacker could trick you into clicking a link to a malicious file. This could lead to session hijacking, theft of sensitive data, or unauthorized actions performed on your behalf within the application. The impact depends on the permissions of the affected user.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR's data protection principles or HIPAA's safeguards for protected health information. Organizations using Jivejdon may face compliance violations, regulatory fines, or reputational damage if exploited.

Useful 0 Not Useful 0

Mitigation Strategies

Immediately update Jivejdon to the latest version. Implement strict file upload validation to reject files with text/html Content-Type. Configure servers to serve uploaded files with correct MIME types and disable inline execution of HTML content.

Useful 0 Not Useful 0