Open Redirect in YOOtheme Zoo Extension

Executive Summary

This vulnerability is an open redirect issue in the Joomla extension Zoo, specifically in the CommentController::twitterAuthenticate() function. The problem occurs because the referer request parameter is passed directly to setRedirect() without validation, allowing attackers to manipulate the URL to redirect users to malicious sites.

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Detection Guidance

Check if the Joomla Zoo extension version is below 4.1.64. Inspect HTTP requests for the referer parameter in CommentController::twitterAuthenticate() to see if it redirects without validation.

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Impact Analysis

This vulnerability could allow attackers to trick users into visiting malicious websites by redirecting them from a trusted Joomla site. Users might unknowingly disclose sensitive information or download malware if they follow the malicious link.

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Compliance Impact

This vulnerability allows open redirect attacks due to unvalidated referer parameters, which could be exploited to trick users into visiting malicious sites. While not directly impacting GDPR or HIPAA compliance, such vulnerabilities may lead to unauthorized data exposure or phishing attacks, potentially violating privacy and security requirements under these regulations.

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Mitigation Strategies

Update the Zoo extension to version 4.1.64 or later. If an update is unavailable, disable the extension or implement input validation for the referer parameter in the affected function.

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