CVE-2021-4402: Multiple Roles Project Multiple Roles

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

The Multiple Roles plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.3.1. This is due to missing or incorrect nonce validation on the mu_add_roles_in_signup_meta() and mu_add_roles_in_signup_meta_recently() functions. This makes it possible for unauthenticated attackers to add additional roles to users via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• Multiple Roles Project Multiple Roles: up to and including 1.3.1

Published 2023-07-01. Last modified 2026-06-17.