---
id: CVE-2026-109447
title: >-
  User Profile Builder <= 4.0.3 - Unauthenticated Privilege Escalation to 'role'
  Parameter via Legacy Meta-Name Collision on [wppb-register]
summary: >-
  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…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-269
vendor: cozmoslabs
product: >-
  User Profile Builder – Beautiful User Registration Forms, User Profiles & User
  Role Editor
affected:
  - >-
    user_profile_builder_beautiful_user_registration_forms_user_profiles_user_role_editor
    <= 4.0.3
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T05:30:24.704Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-109447'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/88bfd754-e2ee-47c7-9af5-f31cbe993102?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-confirmation/email-confirmation.php#L262
  - url: >-
      https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/class-formbuilder.php#L793
  - url: >-
      https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/class-formbuilder.php#L736
  - url: >-
      https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/register.php#L91
  - url: >-
      https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/admin/admin-functions.php#L400
  - url: 'https://plugins.trac.wordpress.org/changeset/3741133/profile-builder'
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3741133/profile-builder/trunk/features/email-confirmation/email-confirmation.php
tags:
  - cve.org
ingestedAt: '2026-10-16T06:00:00.391Z'
---

## Overview

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.

## Affected

- `user_profile_builder_beautiful_user_registration_forms_user_profiles_user_role_editor <= 4.0.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.