Unauthenticated PHP Object Injection in Flatastic

Executive Summary

This is an unauthenticated PHP Object Injection vulnerability in the Flatastic WordPress theme versions 2.0 or lower. It allows attackers to inject malicious PHP objects without authentication, potentially leading to severe consequences like code execution or data theft.

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Detection Guidance

Detecting this vulnerability requires checking if the Flatastic theme version 2.0 or lower is installed on your WordPress site. Inspect the theme's files for suspicious PHP object injection patterns or unusual user input handling. Use commands like 'grep -r "unserialize" /path/to/theme/' to search for unserialize() calls in theme files.

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Impact Analysis

Attackers could exploit this to execute arbitrary code, perform SQL injection, access sensitive data, or cause denial of service on your website. The high CVSS score of 9.8 indicates widespread exploitation attempts are likely.

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Compliance Impact

This vulnerability could lead to unauthorized data access or breaches, violating GDPR (data protection) and HIPAA (health data security) requirements. Non-compliance may result in legal penalties or fines.

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Mitigation Strategies

Immediately apply Patchstack's mitigation rule to block attacks. Consider temporarily disabling the Flatastic theme or replacing it with a secure alternative. Contact your hosting provider or developer for assistance in applying the mitigation or updating the theme once an official patch is released.

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