Open Redirect Vulnerability in Click Tracking Middleware

Executive Summary

This vulnerability involves the click tracking middleware in a TYPO3 extension called Mail. It allows attackers to manipulate links on the website to redirect users to external malicious sites without their knowledge.

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Detection Guidance

Check for outdated versions of the TYPO3 Mail extension (3.12.4 or below, 4.0.0 to 4.1.0). Inspect server logs for unusual redirect patterns or external site accesses. Review extension configuration for exposed click tracking endpoints.

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Impact Analysis

Users could be tricked into visiting harmful websites, potentially leading to phishing attacks, malware downloads, or exposure to malicious content. The vulnerability may also allow attackers to access sensitive data like personal information of newsletter recipients.

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Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection and user consent. Organizations may face legal penalties and reputational damage.

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Mitigation Strategies

Update the TYPO3 Mail extension to version 3.12.5 or 4.2.0 immediately. Disable or restrict access to the click tracking middleware if not essential. Monitor for unauthorized redirects or data access attempts.

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