CVE-2026-19416: CWE-639 Authorization Bypass Through User-Controlled Key in KiviCare
KiviCare WordPress plugin versions before 4.5.4 contain an authorization bypass vulnerability. Authenticated patient-level users can cancel or reschedule appointments belonging to other patients because the plugin does not verify ownership of the appointment being modified.
AI Analysis
Technical Summary
CVE-2026-19416 is an authorization bypass vulnerability in the KiviCare WordPress plugin prior to version 4.5.4. The flaw arises from the plugin's failure to verify that the user requesting to modify an appointment actually owns that appointment. This allows authenticated users with patient-level privileges to cancel or reschedule appointments of other patients, violating access control policies.
Potential Impact
The vulnerability allows unauthorized modification of other patients' appointments by authenticated patient-level users. This could lead to disruption of appointment schedules and potential privacy concerns, but does not impact confidentiality or availability directly. The CVSS score is 4.3 (medium severity), reflecting limited impact on integrity without confidentiality or availability loss.
Mitigation Recommendations
Upgrade KiviCare to version 4.5.4 or later where this authorization bypass vulnerability is fixed. No other mitigation guidance is provided. Since this is a plugin vulnerability, patching the plugin is the recommended and effective remediation.
CVE-2026-19416: CWE-639 Authorization Bypass Through User-Controlled Key in KiviCare
Description
KiviCare WordPress plugin versions before 4.5.4 contain an authorization bypass vulnerability. Authenticated patient-level users can cancel or reschedule appointments belonging to other patients because the plugin does not verify ownership of the appointment being modified.
CVSS v3.1
Score 4.3medium
Affected software
KiviCare
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-19416 is an authorization bypass vulnerability in the KiviCare WordPress plugin prior to version 4.5.4. The flaw arises from the plugin's failure to verify that the user requesting to modify an appointment actually owns that appointment. This allows authenticated users with patient-level privileges to cancel or reschedule appointments of other patients, violating access control policies.
Potential Impact
The vulnerability allows unauthorized modification of other patients' appointments by authenticated patient-level users. This could lead to disruption of appointment schedules and potential privacy concerns, but does not impact confidentiality or availability directly. The CVSS score is 4.3 (medium severity), reflecting limited impact on integrity without confidentiality or availability loss.
Mitigation Recommendations
Upgrade KiviCare to version 4.5.4 or later where this authorization bypass vulnerability is fixed. No other mitigation guidance is provided. Since this is a plugin vulnerability, patching the plugin is the recommended and effective remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-10T10:15:34.638Z
- State
- PUBLISHED
Threat ID: 6a854e95c6e8be033248b2cb
Added to database: 08/19/2026, 06:35:01 UTC
Last enriched: 09/11/2026, 09:48:09 UTC
Last updated: 10/02/2026, 14:46:06 UTC
Views: 55
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