What the vulnerability does
01Description
The User Registration & Membership – Custom Registration Form Builder, Custom Login Form, User Profile, Content Restriction & Membership Plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcode attributes in all versions up to, and including, 4.4.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
A cross-site scripting (XSS) vulnerability in User Registration & Membership allows authenticated users to inject malicious scripts that execute in other users' browsers. The vulnerability affects all versions up to 4.4.6. An attacker with a low-privilege account can craft malicious input that persists in the application, affecting other site visitors and administrators. Update to a version newer than 4.4.6 to remediate.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers, potentially stealing session tokens or performing actions on their behalf.
Potential impact on your site
04Site Impact
Site visitors and admins may have their sessions compromised or be tricked into performing unintended actions.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
December 15, 2025
CVE published
April 8, 2026
Record updated
