CVE-2021-41749: NYSTUDIO107 Seomatic

Critical severity, CVSS 9.8. EPSS: 18.1% chance of exploitation in the next 30 days.

In the SEOmatic plugin up to 3.4.11 for Craft CMS 3, it is possible for unauthenticated attackers to perform a Server-Side Template Injection, allowing for remote code execution.

Affected products

• NYSTUDIO107 Seomatic: up to and including 3.4.11

Published 2022-06-12. Last modified 2026-06-17.