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)

Affected

all versions before 5.3.0

Remediation

Update to 5.3.0 or later.

CVSS 3.1

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

Weakness

CWE-79

Usage

Plugin Medium · Affected versions Medium among sites WPSec scans, 2026-10-13

Attack surface

User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder on WPSec AttackSurface

Fix released

2026-10-12

Published

2026-10-13

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/

Published by WPSec. Provided as is, without warranty. Corrections: contact us.

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