# User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder <= 5.2.8 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Member Name

- **ID:** WPSEC-2026-0824
- **Plugin:** User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder (`user-registration`), https://wordpress.org/plugins/user-registration/
- **Affected versions:** all versions before 5.3.0
- **Fixed in:** 5.3.0 (Update to 5.3.0 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-10-13)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/user-registration
- **Fix released:** 2026-10-12
- **Published:** 2026-10-13
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0824/

## Description

The User Registration & Membership plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the first name and last name profile fields in all versions up to, and including, 5.2.8, due to insufficient input sanitization when the profile is updated and missing output escaping of the member name in the admin Subscriptions list and the plugin's Users list. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts that execute when an administrator views those admin lists.

## References

- https://wpsec.com/vuln/WPSEC-2026-0824/
- https://plugins.svn.wordpress.org/user-registration/tags/5.3.0/
- https://wordpress.org/plugins/user-registration/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0824/

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.