CVE-2026-0561 PoC — Shield Security <= 21.0.8 - Unauthenticated Reflected Cross-Site Scripting via 'message' Parameter

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-0561.yaml

Associated Vulnerability

Title: Shield Security <= 21.0.8 - Unauthenticated Reflected Cross-Site Scripting via 'message' Parameter (CVE-2026-0561)
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.

Description

Shield Security WordPress plugin <= 21.0.8 contains a reflected cross-site scripting caused by insufficient input sanitization and output escaping in the 'message' parameter, letting unauthenticated attackers inject scripts, exploit requires user interaction.

File Snapshot

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