Unauthenticated PHP Object Injection in Masteriyo LMS

Executive Summary

This is an unauthenticated PHP Object Injection vulnerability in the Masteriyo - LMS WordPress plugin versions 3.4.0 and below. It allows attackers to inject malicious PHP objects into the application, 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 Masteriyo - LMS plugin version 3.4.0 or below is installed on your WordPress site. You can use commands like 'wp plugin list' in WordPress CLI or check the plugin version via the WordPress admin dashboard under Plugins.

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Impact Analysis

This vulnerability can allow attackers to execute arbitrary code, steal sensitive data, modify database contents, or disrupt services on your website. Since it is unauthenticated, attackers do not need any prior access to exploit it, making it highly dangerous for unpatched versions.

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Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements and HIPAA's security rules. A successful exploit may result in data breaches, leading to legal penalties, fines, and reputational damage.

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Mitigation Strategies

Immediately update the Masteriyo - LMS plugin to version 3.4.1 or later. If updating is not possible, apply the Patchstack mitigation rule to block attacks until the update is applied. Enable auto-updates for vulnerable plugins if using Patchstack.

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