# User Profile Builder <= 4.0.4 - Authenticated (Administrator+) Privilege Escalation via Front-End Edit Profile Form on Multisite

- **ID:** WPSEC-2026-1356
- **Plugin:** User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor (`profile-builder`), https://wordpress.org/plugins/profile-builder/
- **Affected versions:** all versions before 4.0.5
- **Fixed in:** 4.0.5 (Update to 4.0.5 or later.)
- **Severity:** High 8.0 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)
- **Weakness:** CWE-269
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-10-21)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/profile-builder
- **Fix released:** 2026-10-19
- **Published:** 2026-10-21
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1356/

## Description

The User Profile Builder plugin for WordPress is vulnerable to Privilege Escalation via the front-end Edit Profile form's 'edit_user' parameter in all versions up to, and including, 4.0.4. The plugin lets any subsite user with the remove_users or manage_options capability edit any account. It does not check whether the target is a network Super Admin or belongs to other sites. On WordPress Multisite installations, this makes it possible for authenticated attackers with subsite Administrator-level access and above to change the password and details of a Super Admin or another site's user, leading to a takeover of the whole network.

## References

- https://wpsec.com/vuln/WPSEC-2026-1356/
- https://plugins.svn.wordpress.org/profile-builder/tags/4.0.5/
- https://wordpress.org/plugins/profile-builder/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1356/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.