# User Profile Builder <= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'redirect_url' Shortcode Attribute

- **ID:** WPSEC-2026-1354
- **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:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **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-2026-1354/

## Description

The User Profile Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'redirect_url' attribute of the plugin's Edit Profile and Registration shortcodes in all versions up to, and including, 4.0.4. This is due to the wppb_build_redirect() function placing the redirect URL into a meta refresh tag without escaping. This makes it possible for authenticated attackers with Contributor-level access and above to inject arbitrary web scripts in pages. The scripts run when a user submits the form on the injected page.

## References

- https://wpsec.com/vuln/WPSEC-2026-1354/
- https://plugins.svn.wordpress.org/profile-builder/tags/4.0.5/
- https://wordpress.org/plugins/profile-builder/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1354/

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.