CVE-2026-39447: Nsquared Simply Schedule Appointments

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Unauthenticated Cross Site Scripting (XSS) in Simply Schedule Appointments <= 1.6.10.6 versions.

Affected products

• Nsquared Simply Schedule Appointments: up to and including 1.6.10.6

Published 2026-06-15. Last modified 2026-06-17.