CVE-2026-66583: Wpmu Dev Forminator

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Unauthenticated PHP Object Injection in Forminator <= 1.57.0 versions.

Affected products

• Wpmu Dev Forminator: up to and including 1.57.0

Published 2026-08-20. Last modified 2026-08-20.