CVE-2025-13676: OSTIN654 Justclick Registration Plugin

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

The JustClick registration plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in all versions up to, and including, 0.1. This is due to insufficient input sanitization and output escaping on the `PHP_SELF` server variable. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Affected products

• OSTIN654 Justclick Registration Plugin: up to and including 0.1

Published 2026-01-24. Last modified 2026-06-17.