CVE-2026-19416: Unknown Kivicare

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The KiviCare WordPress plugin before 4.5.4 does not verify that the requesting user owns the appointment being modified, allowing authenticated patient-level users to cancel and reschedule other patients' appointments.

Affected products

• Unknown Kivicare: before 4.5.4 (fixed in 4.5.4)

Published 2026-08-19. Last modified 2026-08-26.