CVE-2026-65508: Nsquared Simply Schedule Appointments

Critical severity, CVSS 9.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Unauthenticated SQL Injection in Simply Schedule Appointments <= 1.6.12.10 versions.

Affected products

• Nsquared Simply Schedule Appointments: up to and including 1.6.12.10

Published 2026-08-06. Last modified 2026-08-12.