Unauthenticated PHP Object Injection in Popup by Supsystic

Executive Summary

This is an unauthenticated PHP Object Injection vulnerability in the Popup by Supsystic WordPress plugin versions 1.13.0 and below. It allows attackers to inject malicious PHP objects without authentication, potentially leading to code execution, SQL injection, or other attacks if a suitable POP chain exists.

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Detection Guidance

Detecting this vulnerability requires checking if the Popup by Supsystic plugin version 1.13.0 or below is installed. Inspect WordPress installations for the plugin and verify the version. No specific commands are provided in the context, but monitoring for unusual activity or unauthorized access attempts may indicate exploitation.

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Impact Analysis

An attacker could exploit this to execute arbitrary code, steal sensitive data, modify website content, or disrupt services. Since it requires no authentication, it poses a high risk for mass exploitation across many websites using vulnerable versions.

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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, fines, or reputational damage due to exposed sensitive information.

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Mitigation Strategies

Immediately update the Popup by Supsystic plugin to version 1.13.1 or later. If updating is not possible, apply the mitigation rule provided by Patchstack to block attacks. Contact your hosting provider or developer for assistance if needed.

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