Meta Box AIO Plugin up to 3.8.0 on WordPress MB Frontend Submission Extension handle_request/check_ajax rwmb_frontend_field_object_id improper authorization

Summaryinfo

A vulnerability was found in Meta Box AIO Plugin up to 3.8.0. It has been classified as critical. The affected element is the function handle_request/check_ajax of the component MB Frontend Submission Extension. The manipulation of the argument rwmb_frontend_field_object_id leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-14488. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Meta Box AIO Plugin up to 3.8.0. It has been rated as critical. This issue affects the function handle_request/check_ajax of the component MB Frontend Submission Extension. The manipulation of the argument rwmb_frontend_field_object_id with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. The summary by CVE is:

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 is due to the handle_request() function routing the mbfs_delete action without any capability or ownership check, and the nonce verification in check_ajax() being gated behind is_ajax() which is false for template_redirect requests, making it bypassable. This makes it possible for 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 advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-14488 since 07/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/29/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-50274). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Meta Box

Name

• AIO Plugin

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion