Unauthorized Content Access in Simple Restrict WordPress Plugin

Executive Summary

The Simple Restrict WordPress plugin before version 1.2.9 has a flaw where it does not properly enforce its content-restriction permissions on the REST API. Unlike the front end, which uses the plugin's specific permission system, the REST API relies on a generic capability check. This allows users with contributor-level access or higher to read restricted posts and pages they should not have access to.

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Detection Guidance

To detect this vulnerability, check if your Simple Restrict WordPress plugin is outdated. Run commands like 'wp plugin list' to verify the installed version. If it's below 1.2.9, the vulnerability may exist.

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Impact Analysis

If you use the Simple Restrict WordPress plugin before version 1.2.9, unauthorized users with contributor-level access or above could read content that was meant to be restricted. This could lead to data leaks, unauthorized access to sensitive information, or violation of intended access controls.

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Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA if restricted content includes personal or sensitive data. Unauthorized access to such data may result in legal penalties, fines, or reputational damage due to violations of data protection requirements.

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Mitigation Strategies

Update the Simple Restrict WordPress plugin to version 1.2.9 or later to ensure proper permission checks are enforced on the REST API.

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