CVE-2026-14488 Meta Box CVE debrief

Who should care

Defenders responsible for WordPress installations using the Meta Box AIO plugin and the MB Frontend Submission extension should assess exposure and prioritize verification and updates.

Why it matters

The vulnerability in the Meta Box AIO plugin for WordPress allows unauthenticated attackers to delete arbitrary posts and pages, requiring defenders to assess exposure and prioritize updates.

• Unauthenticated attackers can delete arbitrary posts and pages
• Requires verification of WordPress installations using the MB Frontend Submission extension
• Prioritize updating the Meta Box AIO plugin to a version beyond 3.8.0

Technical summary

The Meta Box AIO plugin for WordPress is vulnerable to Missing Authorization via the template_redirect dispatcher in the MB Frontend Submission extension in versions up to, and including, 3.8.0. This vulnerability allows unauthenticated attackers to delete arbitrary posts and pages by supplying an attacker-controlled post ID via the rwmb_frontend_field_object_id GET parameter on any page that hosts a frontend submission form, regardless of whether allow_delete is enabled. The handle_request() function routes the mbfs_delete action without any capability or ownership check, and the nonce verification in check_ajax() is gated behind is_ajax() which is false for template_redirect requests, making it bypassable.

Defensive priority

Defenders should prioritize verifying and updating the Meta Box AIO plugin to a version beyond 3.8.0, and assess exposure of WordPress installations using the MB Frontend Submission extension.

Recommended defensive actions

• Verify and update the Meta Box AIO plugin to a version beyond 3.8.0
• Assess exposure of WordPress installations using the MB Frontend Submission extension
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in the Meta Box AIO plugin for WordPress. The vulnerability allows unauthenticated attackers to delete arbitrary posts and pages. Evidence is limited to public sources and may not reflect the full scope of affected systems or specific vendor mitigations. Defenders should verify WordPress installations using the MB Frontend Submission extension and assess exposure to this vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.