CVE-2026-0561: Shield Security <= 21.0.8 - Unauthenticated Reflected Cross-Site Scripting via 'message' Parameter
paultgoodchild · Shield: Blocks Bots, Protects Users, and Prevents Security Breaches
Affected: paultgoodchild Shield: Blocks Bots, Protects Users, and Prevents Security Breaches · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 51% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- paultgoodchild · Shield: Blocks Bots, Protects Users, and Prevents Security Breachesup to and including 21.0.8
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- Shield Security <= 21.0.8 - Unauthenticated Reflected XSS · nuclei template in projectdiscovery/nuclei-templates
- Weakness
- Cross-site Scripting
- Vendor
- paultgoodchild
- Published
- February 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-0561 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.