BaseFortify

Executive Summary

CVE-2026-39761 is an unauthenticated privilege escalation vulnerability in Meta Box AIO plugin versions 3.7.1 and below. It allows low-privilege users to escalate their access to administrator level without authentication.

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Detection Guidance

Check if the Meta Box AIO plugin version is 3.7.1 or lower. Look for unauthorized admin account creation or privilege changes in WordPress logs. Monitor for suspicious user activity or new admin accounts.

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Impact Analysis

Attackers can gain full control over your WordPress site, allowing them to modify content, install malware, steal data, or take the site offline. The high CVSS score of 9.8 indicates critical risk with no authentication required for exploitation.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection and access control. Non-compliance may result in legal penalties and reputational damage.

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Mitigation Strategies

Disable the Meta Box AIO plugin immediately if possible. Apply Patchstack's temporary mitigation rule if available. Contact your hosting provider or developer for assistance. Monitor for signs of exploitation.

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