The Stop Registration Spam plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.23. This is due to missing or incorrect nonce validation. This makes it possible for unauthenticated attackers to inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Cross-Site Request Forgery (CSRF) vulnerability in Tom Royal Stop Registration Spam allows Stored XSS.This issue affects Stop Registration Spam: from n/a through 1.23.