Reflected XSS in Page Builder CK Joomla Extension

Executive Summary

This is a reflected Cross-Site Scripting (XSS) vulnerability in the Joomla extension Page Builder CK versions before 3.6.5. It allows attackers to inject malicious scripts via the iscontenttype parameter, which are then reflected back to users in the web browser.

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Detection Guidance

Check if the Page Builder CK extension version is below 3.6.5. Inspect HTTP requests for the iscontenttype parameter in Joomla pages. Look for reflected XSS payloads in responses.

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Impact Analysis

An attacker could exploit this to steal user sessions, cookies, or sensitive data. It may also enable phishing attacks by tricking users into executing malicious scripts in their browsers.

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Compliance Impact

This vulnerability could lead to unauthorized data access or disclosure, violating GDPR's data protection principles and HIPAA's security requirements for safeguarding sensitive information.

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Mitigation Strategies

Update Page Builder CK to version 3.6.5 or later. Remove or disable the vulnerable extension if updates are unavailable. Monitor for unusual activity in Joomla logs.

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