CVE-2026-40792

KiviCare – Clinic & Patient Management System (EHR) <= 4.2.1 - Authenticated (Subscriber+) Insecure Direct Object Reference

2026-04-23 00:00

Strategic Overview

Status: Patched in 4.3.0
Affected Plugin: KiviCare – Clinic & Patient Management System (EHR)
Affected Version: <= 4.2.1
CVSS: 4.3Medium
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2026-40792

View all KiviCare – Clinic & Patient Management System (EHR) vulnerabilities

At a glance

CVE-2026-40792 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the KiviCare WordPress plugin, affecting versions <= 4.2.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.3.0; sites on affected versions should update now. Disclosed April 2026, reported by Jakub Herman.

Vulnerability Overview

The KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.2.1 due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to perform an unauthorized action.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in KiviCare <= 4.2.1 takes an account at Subscriber level or above. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For KiviCare the fix is 4.3.0: builds <= 4.2.1 are affected, anything from 4.3.0 onward is not.

Remediation

Update to version 4.3.0, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: KiviCare 4.3.0 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-40792 https://www.wordfence.com/threat-intel/vulnerabilities/id/6af0aa17-2bbf-489e-aedb-95b514f6c9a2 https://nvd.nist.gov/vuln/detail/CVE-2026-40792

Related records

Same weakness class

Other vulnerabilities in KiviCare – Clinic & Patient Management System (EHR)

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/