CVE-2026-84764: Nsquared Simply Schedule Appointments

High severity, CVSS 8.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Unauthenticated Cross Site Request Forgery (CSRF) in Simply Schedule Appointments <= 1.6.12.23 versions.

Affected products

• Nsquared Simply Schedule Appointments: up to and including 1.6.12.23

Published 2026-09-02. Last modified 2026-09-04.