CVE-2026-13355

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://metabox.io/changelog/
https://metabox.io/plugins/meta-box-aio/changelog/
https://www.wordfence.com/threat-intel/vulnerabilities/id/3b7b6e7e-b944-45f8-a6d8-bfd859bec0d1?source=cve

Configurations

No configuration.

History

22 Sep 2026, 05:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-22 05:16

Updated : 2026-09-22 19:04

NVD link : CVE-2026-13355

Mitre link : CVE-2026-13355

CVE.ORG link : CVE-2026-13355

JSON object : View

Products Affected

No product.

CWE

CWE-269

Improper Privilege Management

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