Unauthenticated Stored XSS in Fabrik Joomla Extension

Executive Summary

This is an unauthenticated stored cross-site scripting (XSS) vulnerability in the Fabrik Joomla extension versions before 4.7.2. It occurs due to improper handling of user-supplied input in the jsactions feature, allowing attackers to inject malicious scripts that are stored on the server and executed when other users access the affected page.

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Detection Guidance

To detect this vulnerability, check the version of the Fabrik extension in your Joomla installation. If it is below 4.7.2, the system is vulnerable. Review user input handling in the jsactions feature for potential XSS vectors.

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Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or deliver malware to visitors. Since it is stored, the attack persists until the injected script is removed. Users with admin privileges are particularly at risk if the injected script targets administrative functions.

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Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements for safeguarding protected health information. Organizations may face fines or penalties for failing to protect user data adequately.

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Mitigation Strategies

Immediately update the Fabrik extension to version 4.7.2 or later. If updating is not possible, disable the jsactions feature or restrict user input handling to prevent XSS attacks.

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