Is CVE-2026-59523 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-59523?

CVE-2026-59523 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-59523

Description

Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.11.11.