What is CVE-2026-19416?

CVE-2026-19416 is a medium-severity vulnerability in Kivicare, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-08-19.

How severe is CVE-2026-19416?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Kivicare

CVE-2026-19416

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-08-19 · last modified 2026-08-26.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.7th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Kivicare

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

wpscan.com/vulnerability/ef2aa44b-3624-4e6d-9b25-e33d4a1a21d2/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-19416?: CVE-2026-19416 is a medium-severity vulnerability in Kivicare, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-08-19.
How severe is CVE-2026-19416?: Medium severity. CVSS v3 base score is 4.3 out of 10.