CVE-2026-39761
CriticalCVSS 9.8Summary
Unauthenticated Privilege Escalation vulnerability in Meta Box AIO versions up to 3.7.1. An attacker without authentication can gain higher privileges.
Risk Assessment
Potential for application takeover, unauthorized access to data and administrative functions.
Recommendation
Update Meta Box AIO to a version that includes a fix for the vulnerability.
Other vulnerabilities in Meta Box AIO
See all- CVE-2026-13355Critical
The Meta Box AIO plugin for WordPress is vulnerable to Privilege Escalation to Administrator in versions up to, and including, 3.11.0. This is due to a chained flaw: populate_via_query_string() unconditionally overrides the form's target object_id without authorization checks, and Form::process() lacks the user_can_edit() check, allowing unauthenticated attackers to overwrite any page's post_content with an arbitrary shortcode via wp_update_post(); the mb-user-profile component then trusts the 'role' and 'auto_login' shortcode attributes in the injected [mb_user_profile_register] shortcode without role validation. The standalone plugins Meta Box Frontend Submission (up to 4.5.6) and Meta Box User Profile (up to 3.11.0) are also affected.
- CVE-2026-14488Critical
Meta Box AIO plugin for WordPress up to 3.8.0 (with MB Frontend Submission) lacks authorization in the template_redirect dispatcher. The handle_request() function routes the mbfs_delete action without capability checks, and nonce verification is bypassed because is_ajax() returns false for template_redirect requests. Unauthenticated attackers can delete arbitrary posts and pages by supplying a post ID via the rwmb_frontend_field_object_id parameter.
Original NVD description (English source)
Unauthenticated Privilege Escalation in Meta Box AIO <= 3.7.1 versions.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS