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4.3

KiviCare < 4.5.4: Unsecured Appointment Modification

CVE-2026-19416 · published 2 months ago
Summary

The KiviCare plugin for WordPress allows patients to modify other patients' appointments. This is a security risk because it lets one patient see and change another's schedule. Update to version 4.5.4 or later to fix this issue.

What to do
  • Update unknown kivicare to version 4.5.4 or later.
Affected software
VendorProductAffected versions
unknown kivicare < 4.5.4
Original advisory text
KiviCare < 4.5.4 - Patient+ Cross-Patient Appointment Modification via IDOR
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-639Authorization Bypass Through User-Controlled Key
Timeline
Published19 Aug 2026
Updated4 Nov 2026
First seen19 Aug 2026
Sources
CVE-2026-19416 · NVD
CVE-2026-19416 · MITRE
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