{"id":"CVE-2026-13355","published":"2026-09-22T05:16:54.960","lastModified":"2026-09-22T19:04:55.677","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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-269"],"vendors":[],"products":[],"references":[{"url":"https://metabox.io/changelog/","tags":[]},{"url":"https://metabox.io/plugins/meta-box-aio/changelog/","tags":[]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/3b7b6e7e-b944-45f8-a6d8-bfd859bec0d1?source=cve","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The flaw allows unauthenticated attackers to escalate privileges to Administrator by exploiting a chained vulnerability in the Meta Box AIO plugin for WordPress.","exploitability":"Exploitation is relatively straightforward as it requires unauthenticated access and the presence of specific shortcode attributes.","blast_radius":"If exploited, the attacker can gain full control over the WordPress site, potentially leading to data loss or site compromise.","remediation":"Upgrade to Meta Box AIO version 3.12.0 or later, as this version addresses the vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","wp-plugin"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-27T08:59:16.008Z"}}