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 that allows authenticated patient-level users to modify appointments they do not own. Specifically, the plugin fails to verify ownership of the appointment when a user attempts to cancel or reschedule it, enabling unauthorized access to other patients' appointments.
AI Analysis
Technical Summary
The KiviCare WordPress plugin prior to version 4.5.4 does not properly verify that the authenticated user owns the appointment they are attempting to modify. This authorization bypass (CWE-639) allows patient-level users to cancel or reschedule appointments belonging to other patients. The vulnerability arises from insufficient access control checks on user-controlled keys referencing appointments.
Potential Impact
Authenticated patient-level users can cancel or reschedule appointments of other patients, potentially causing disruption to appointment schedules and privacy violations. There is no indication of remote unauthenticated exploitation or privilege escalation beyond patient-level users.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict patient-level user permissions where possible and monitor for suspicious appointment modifications.
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 that allows authenticated patient-level users to modify appointments they do not own. Specifically, the plugin fails to verify ownership of the appointment when a user attempts to cancel or reschedule it, enabling unauthorized access to other patients' appointments.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The KiviCare WordPress plugin prior to version 4.5.4 does not properly verify that the authenticated user owns the appointment they are attempting to modify. This authorization bypass (CWE-639) allows patient-level users to cancel or reschedule appointments belonging to other patients. The vulnerability arises from insufficient access control checks on user-controlled keys referencing appointments.
Potential Impact
Authenticated patient-level users can cancel or reschedule appointments of other patients, potentially causing disruption to appointment schedules and privacy violations. There is no indication of remote unauthenticated exploitation or privilege escalation beyond patient-level users.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict patient-level user permissions where possible and monitor for suspicious appointment modifications.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-10T10:15:34.638Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a854e95c6e8be033248b2cb
Added to database: 08/19/2026, 06:35:01 UTC
Last enriched: 08/19/2026, 06:53:47 UTC
Last updated: 08/19/2026, 07:04:03 UTC
Views: 5
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