KiviCare patients can cancel or reschedule other patients' appointments
KiviCare before 4.5.4 does not verify that the requesting patient owns the appointment being modified. An authenticated KiviCare patient can select another patient's appointment and cancel or reschedule it.
- Component
- KiviCare
- Plugin slug
kivicare-clinic-management-system- Affected
- < 4.5.4
- Safe version
4.5.4- Published
- Aug 19, 2026
This CVE was published Aug 19, 2026 and is one of 22 known issues for this plugin.
Update, patch or deactivate.
Update KiviCare to 4.5.4 or later and audit appointment changes made by patient-level accounts.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N