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Wordfence and NVD confirm the critical authorization bypass in Meta Box AIO plugin versions up to 3.8.0 (CVE-2026-14488).

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Home/Tech/WordPress Meta Box AIO Plugin Carries Critical Authorization Bypass
VERIFIEDBy Xavier Rivera· ·1 min read

WordPress Meta Box AIO Plugin Carries Critical Authorization Bypass

The Meta Box AIO WordPress plugin is vulnerable to missing authorization (CVE-2026-14488, CVSS 9.1) in versions up to 3.8.0, allowing unauthenticated attackers to delete arbitrary posts and pages via a bypassable nonce check. The flaw impacts any site with a frontend submission form regardless of delete settings.

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WordPress Meta Box AIO Plugin Carries Critical Authorization Bypass
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TL;DRAI · 60 sec read

Unauthenticated attackers can delete arbitrary posts and pages on WordPress sites running Meta Box AIO plugin versions up to 3.8.0. The flaw, CVE-2026-14488, results from missing authorization checks in the MB Frontend Submission extension that bypass nonce validation on pages with frontend forms. It scores 9.1 on CVSS 3.1 and was published July 29, 2026.

Unauthenticated attackers can delete arbitrary posts and pages in sites running the Meta Box AIO plugin for WordPress.

A missing authorization flaw affects versions up to, and including, 3.8.0. The issue, tracked as CVE-2026-14488, originates in the template_redirect dispatcher within the MB Frontend Submission extension. According to Wordfence, the handle_request() function processes the mbfs_delete action without performing any capability or ownership verification.
The plugin's nonce check inside check_ajax() sits behind an is_ajax() guard that evaluates to false during template_redirect calls, allowing the verification to be bypassed.

The plugin's nonce check inside check_ajax() sits behind an is_ajax() guard that evaluates to false during template_redirect calls, allowing the verification to be bypassed. Attackers can therefore delete any post or page by supplying a chosen ID through the rwmb_frontend_field_object_id GET parameter on pages that contain a frontend submission form.
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The flaw exists on any page hosting a frontend submission form. Exploitation succeeds regardless of whether the allow_delete setting is active. Wordfence assigned the vulnerability a CVSS 3.1 base score of 9.1, with the vector string "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H".
Exploitation succeeds regardless of whether the allow_delete setting is active.
The National Vulnerability Database published the CVE record on July 29, 2026. It was received from Wordfence the same day at 7:16:48 AM. The weakness is classified as CWE-862, Missing Authorization.
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References include the official changelog and a detailed Wordfence advisory. The affected product listing shows Meta Box Meta Box AIO as impacted from version 0 through 3.8.0. The changelog at metabox.io and the Wordfence threat intel page provide additional details on the issue.
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