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6.1
Shield Security plugin for WordPress: Malicious Scripts Can Be Injected
CVE-2026-0561
Summary
The Shield Security plugin for WordPress has a security flaw that allows attackers to inject malicious scripts into websites. This can happen if a user clicks on a link sent by an attacker. Update the plugin to the latest version to fix this issue.
Original title
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 sanitizat...
Original description
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.
nvd CVSS3.1
6.1
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
Published: 19 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026