---
title: "User Profile Builder WordPress Plugin - Privilege Escalation"
description: "User Profile Builder WordPress plugin <= 4.0.3 contains a privilege escalation caused by lack of allow-list validation on the 'role' parameter in wppb_add_meta_to_user_on_activation(), letting unauthenticated attackers gain administrator privileges via the public registration form, exploit requires legacy 'role' form field, email confirmation, and open user registration."
url: https://panop.io/threat-heartbeat/CVE-2026-109447/
---

# CVE-2026-109447 User Profile Builder WordPress Plugin - Privilege Escalation

User Profile Builder WordPress plugin <= 4.0.3 contains a privilege escalation caused by lack of allow-list validation on the 'role' parameter in wppb\_add\_meta\_to\_user\_on\_activation(), letting unauthenticated attackers gain administrator privileges via the public registration form, exploit requires legacy 'role' form field, email confirmation, and open user registration.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109447)

## Details

Type

Broken Access Control

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

16 October 2026

Updated

16 October 2026

Weakness

[CWE-269](https://cwe.mitre.org/data/definitions/269.html)

## Vendor fix

Update to a version later than 4.0.3 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-109447](https://nvd.nist.gov/vuln/detail/CVE-2026-109447)
- [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/class-formbuilder.php#L736)
- [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#L793)
- [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/front-end/register.php#L91)
- [https://plugins.trac.wordpress.org/changeset/3741133/profile-builder](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](https://plugins.trac.wordpress.org/changeset/3741133/profile-builder/trunk/features/email-confirmation/email-confirmation.php)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/88bfd754-e2ee-47c7-9af5-f31cbe993102?source=cve](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/admin/admin-functions.php#L400](https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/admin/admin-functions.php#L400)
- [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/features/email-confirmation/email-confirmation.php#L262)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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