ThemeREX Travesia Object Injection Vulnerability

Executive Summary

This vulnerability is a PHP Object Injection flaw in the WordPress Travesia Theme versions up to 1.1.16. It allows attackers to inject malicious objects during deserialization, potentially leading to harmful server actions. The issue is unauthenticated and highly dangerous with a CVSS score of 9.8.

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Detection Guidance

Detecting this vulnerability requires checking if the Travesia theme version 1.1.16 or earlier is installed. Inspect WordPress installations for the theme directory and verify the version in the style.css file. Use commands like 'grep -r "Travesia" /path/to/wordpress/wp-content/themes/' or 'find /path/to/wordpress -name "style.css" -exec grep -l "Travesia" {} \;' to locate the theme.

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Impact Analysis

Attackers can exploit this to manipulate site data processing, leading to unauthorized actions on the server. Since it requires no special privileges, it poses a significant risk for mass exploitation campaigns targeting websites using the vulnerable theme.

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Compliance Impact

This vulnerability could lead to unauthorized data access or manipulation, which may violate GDPR's data integrity and confidentiality requirements if personal data is compromised. For HIPAA, it risks exposing protected health information if exploited in healthcare-related systems. The lack of authentication increases the risk of breaches, potentially resulting in non-compliance with these regulations.

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Mitigation Strategies

Immediately apply Patchstack's mitigation rule to block attacks until an official patch is released. Update the Travesia theme to the latest version if available. If no update exists, contact your hosting provider or a web developer for assistance. Consider disabling the theme temporarily if it is not critical for site functionality.

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