Stored XSS in Helix Ultimate Joomla Extension

Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the Media Picker feature of the Helix Ultimate Joomla extension versions before 2.2.11. It allows attackers with limited privileges to inject malicious scripts into web pages, which are then stored and executed when other users view the page.

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Detection Guidance

To detect this Stored XSS vulnerability in Helix Ultimate versions before 2.2.11, inspect Joomla sites using the extension for media picker functionality. Check for user input handling in file uploads or media management features. Review JavaScript code for improper sanitization of user-provided data in the media picker interface.

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Impact Analysis

An attacker could steal user sessions, deface websites, or redirect users to malicious sites. Users with access to the Media Picker could compromise the site, while visitors may have their data exposed or their browsers hijacked.

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Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection principles or HIPAA's security requirements for protected health information. Organizations may face compliance breaches, legal penalties, or reputational damage if exploited.

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Mitigation Strategies

Update the Helix Ultimate Joomla extension to version 2.2.11 or later to address the Stored XSS vulnerability in the Media Picker.

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