User Profile Builder <= 4.0.3 - Unauthenticated Privilege Escalation to 'role' Parameter via Legacy Meta-Name Collision on [wppb-register]

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-109447
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 06:17:08 UTC
Updated2026-10-16 06:17:08 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cozmoslabs User Profile Builder Beautiful User Registration Forms User Profiles User Role Editor affected 4.0.3 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/88bfd754-e2ee-47c7-9af5-f31cb... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-confirmatio... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/admin/admin-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3741133/profile-builder [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/class-formbuilde... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/register.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3741133/profile-builder/trunk/features/email-confir... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/class-formbuilde... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Supakiad S. (m3ez) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-10-08T20:48:40.000ZVendor Notified
CNA2026-10-15T16:37:33.000ZDisclosed

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report