Medium severity · published Aug 19, 2026
CVE-2026-19416
KiviCare < 4.5.4 - Patient+ Cross-Patient Appointment Modification via IDOR
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
KiviCare ·
before 4.5.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19416
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19416
wpscan.com
https://wpscan.com/vulnerability/ef2aa44b-3624-4e6d-9b25-e33d4a1a21d2/
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