CVE-2026-8420: Rdbeach Blogchat Chat System

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

The BLOGCHAT Chat System plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.3.6.3. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to update settings and 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.

Affected products

• Rdbeach Blogchat Chat System: up to and including 1.3.6.3

Published 2026-05-20. Last modified 2026-07-23.