Meta Box AIO <= 3.11.0 And Standalone Plugin Extensions - Unauthenticated Privilege Escalation to Administrator to 'rwmb_frontend_field_object_id' Parameter
| CVE | CVE-2026-13355 |
|---|---|
| CVSS | 9.8 (Critical) |
| Publicly Published | September 21, 2026 |
| Last Updated | September 22, 2026 |
| Researcher |
h0xilo
|
Description
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: the populate_via_query_string() function in the mb-frontend-submission component unconditionally overrides the form's target object_id from the GET parameter 'rwmb_frontend_field_object_id' without any authorization check, and Form::process() lacks the user_can_edit() check present in render(), allowing unauthenticated attackers to overwrite the post_content of any page with an arbitrary shortcode via wp_update_post(); the mb-user-profile component then directly trusts the 'role' and 'auto_login' shortcode attributes in the injected [mb_user_profile_register] shortcode with no role validation. This makes it possible for unauthenticated attackers to elevate their privileges to Administrator. The standalone plugins Meta Box Frontend Submission (in versions up to 4.5.6) and Meta Box User Profile (versions up to 3.11.0) are also affected.
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Vulnerability Details for Meta Box Frontend Submission
| Software Type | Plugin |
|---|---|
| Software Slug | mb-frontend-submission |
| Patched? | Yes |
| Remediation | Update to version 4.6.0, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Meta Box Frontend Submission
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | Meta Box AIO <= 3.7.2 And Standalone Plugin Extensions - Unauthenticated Privilege Escalation to Administrator to 'rwmb_frontend_field_object_id' Parameter | CVE-2026-13355 | h0xilo | September 21, 2026 |
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