Authenticated Stored XSS in DP Calendar Joomla Extension

Executive Summary

This is an authenticated, privileged stored cross-site scripting (XSS) vulnerability in the DP Calendar Joomla extension versions 7.0.0 to 10.11.2. The issue occurs because location titles are rendered in a data attribute without proper escaping, allowing malicious scripts to be stored and executed when viewed by other users.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability is specific to Joomla with the DP Calendar extension versions 7.0.0 to 10.11.2. To detect it, check if the extension is installed and verify its version. Look for unusual JavaScript execution or stored XSS payloads in location titles within the application.

Useful 0 Not Useful 0

Impact Analysis

An attacker with create permissions in DPCalendar could inject malicious scripts via location titles. When other users view the affected pages, the scripts execute in their browsers, potentially stealing session cookies, redirecting to phishing sites, or performing unauthorized actions on their behalf.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality principles or HIPAA's security requirements for protected health information. Organizations may face compliance violations if user data is compromised through this exploit.

Useful 0 Not Useful 0

Mitigation Strategies

Immediately update the DP Calendar extension to the latest version beyond 10.11.2. If an update is unavailable, disable or uninstall the extension. Review and sanitize user inputs, especially for location titles, to prevent XSS attacks.

Useful 0 Not Useful 0