CVE-2026-57317: Nsquared Simply Schedule Appointments

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Unauthenticated Cross Site Scripting (XSS) in Simply Schedule Appointments <= 1.6.12.2 versions.

Affected products

• Nsquared Simply Schedule Appointments: up to and including 1.6.12.2

Published 2026-06-26. Last modified 2026-06-26.