CVE-2026-11990: KiviCare <= 4.4.0 - Missing Authorization to Unauthenticated Payment Bypass and Appointment Status Manipulation via /payment-success REST Endpoint

Published Jul 10, 2026
·
Updated

The KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.4.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to mark arbitrary pending appointments as Confirmed and forge an associated completed payment record in wpkcpaymentsappointmentmappings using an attacker-supplied payment ID, bypassing payment entirely. This exploit is achievable on a default installation because the gateway resolution logic returns all registered gateways regardless of admin-enabled status, making the manual (KCPayLater) gateway always selectable.

Affected Software

1 affected component
KiviCare KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress<=4.4.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress to a version that resolves this vulnerability.

    Fixed in 4.4.0
  2. Compensating control

    Because the issue is reachable via the /payment-success REST endpoint on default installations, restrict access to the WordPress REST endpoint(s) for payment-success from unauthenticated users using a WAF/firewall/ACL or network controls.

Event History

Jul 10, 2026
CVE Published
via MITRE·09:32 AM
Data Sourced
via MITRE·09:32 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·10:16 AM
DescriptionSeverityWeakness
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-11990?

The severity of CVE-2026-11990 is assessed as medium with a score of 5.3.

2

How do I fix CVE-2026-11990?

To fix CVE-2026-11990, update the KiviCare plugin to version 4.4.1 or later.

3

What kind of attacks can CVE-2026-11990 enable?

CVE-2026-11990 can enable unauthorized payment bypass and manipulation of appointment statuses by unauthenticated users.

4

Which versions of KiviCare are affected by CVE-2026-11990?

All versions of KiviCare up to and including 4.4.0 are affected by CVE-2026-11990.

5

Is user authentication bypass possible with CVE-2026-11990?

Yes, CVE-2026-11990 allows for an authorization bypass, enabling unauthenticated users to perform actions.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203
CVE-2026-11990 - KiviCare <= 4.4.0 - Missing Authorization to Unauthenticated Payment Bypass and Appointment Status Manipulation via /payment-success REST Endpoint - SecAlerts