WP Remote Users Sync Plugin Privilege Escalation Vulnerability

Executive Summary

This vulnerability is in the WP Remote Users Sync WordPress plugin before version 2.2.1. It allows a site with shared synchronization keys to escalate privileges by assigning the administrator role to users, modifying existing accounts, and writing arbitrary user metadata. This bypasses the receiving site's role and metadata restrictions.

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Detection Guidance

Check if the WP Remote Users Sync plugin version is below 2.2.1 by inspecting the plugin files or WordPress admin panel. Look for unauthorized administrator accounts or unexpected user metadata changes in the database.

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Impact Analysis

If exploited, an attacker with access to synchronization keys could gain full administrative control over a WordPress site. This could lead to complete site takeover, unauthorized data access, or modification of site content and settings.

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Compliance Impact

This vulnerability could lead to unauthorized access and modification of sensitive user data, violating GDPR and HIPAA compliance requirements. It may result in data breaches, unauthorized data processing, and failure to maintain data integrity and confidentiality.

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Mitigation Strategies

Update the WP Remote Users Sync plugin to version 2.2.1 or later immediately. Review user accounts for unauthorized administrator roles or metadata changes. Revoke and regenerate any shared synchronization keys used by untrusted sites.

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