CVE-2026-0561: Paultgoodchild Shield: Blocks Bots, Protects Users, And Prevents Security Breaches

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

The Shield Security plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'message' parameter in all versions up to, and including, 21.0.8 due to insufficient input sanitization and output escaping. 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

• Paultgoodchild Shield: Blocks Bots, Protects Users, And Prevents Security Breaches: up to and including 21.0.8

Published 2026-02-19. Last modified 2026-06-17.