{"id":"CVE-2026-109447","revision":"fcbee8f22032447eaf70dbfc5591f8b4","records":[{"revision":"fcbee8f22032447eaf70dbfc5591f8b4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109447","aliases":[],"title":"User Profile Builder <= 4.0.3 - Unauthenticated Privilege Escalation to 'role' Parameter via Legacy Meta-Name Collision on [wppb-register]","description":"The User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.0.3 via the `role` parameter handled by the `wppb_add_meta_to_user_on_activation()` function. The vulnerability exists because the activation handler passes the attacker-supplied role value directly to `WP_User::set_role()` with no allow-list validation, and the 4.0.3 reserved-name check exempts pre-existing form fields from the block, allowing a legacy field with meta-name `role` to persist and bridge attacker-controlled request input into the serialized signup record stored in `wp_signups`. This makes it possible for unauthenticated attackers to gain a fully activated WordPress administrator account by submitting `role=administrator` through the public `[wppb-register]` shortcode form and subsequently clicking the confirmation activation link. Exploitation requires the site to have a legacy form field with meta-name `role` carried over from before the 4.0.3 upgrade, email confirmation enabled, and open user registration — all stable site-state conditions once established.","state":0,"publishedAt":"2026-10-16T05:30:24.704+00:00","modifiedAt":"2026-10-16T15:09:38.993+00:00","affected":[{"ecosystem":"Vendor product","name":"User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"cozmoslabs\",\n                    \"product\": \"User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"lessThanOrEqual\": \"4.0.3\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/88bfd754-e2ee-47c7-9af5-f31cbe993102?source=cve","https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-confirmation/email-confirmation.php#L262","https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/class-formbuilder.php#L793","https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/class-formbuilder.php#L736","https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/register.php#L91","https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/admin/admin-functions.php#L400","https://plugins.trac.wordpress.org/changeset/3741133/profile-builder","https://plugins.trac.wordpress.org/changeset/3741133/profile-builder/trunk/features/email-confirmation/email-confirmation.php"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109447","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109447","identifiers":["CVE-2026-109447"]},"retained":false,"historicalAffected":[]}],"coverage":[]}