Unauthenticated PHP Object Injection in Kalles Addons

Executive Summary

This is an unauthenticated PHP Object Injection vulnerability in the Kalles Addons WordPress plugin versions 1.0.6 or lower. 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 Kalles Addons plugin version 1.0.6 or lower is installed on your WordPress site. You can verify the plugin version by inspecting the plugin files or checking the WordPress admin panel under Plugins. 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

This vulnerability can allow attackers to execute arbitrary code, manipulate databases, access sensitive files, or disrupt services on your website. Since it is unauthenticated, attackers can target any vulnerable site without needing credentials.

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Compliance Impact

This vulnerability could lead to data breaches, unauthorized access, or data exfiltration, which may violate GDPR, HIPAA, or other regulations. Compliance failures could result in legal penalties, fines, or reputational damage.

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Mitigation Strategies

Immediately update the Kalles Addons plugin to the latest version if available. If no patch exists, disable or remove the plugin entirely. Apply Patchstack's mitigation rule to block attacks until an official fix is released. Seek assistance from a hosting provider or developer for further guidance.

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