Authentication Bypass Vulnerability in KiviCare Plugin for WordPress
CVE-2026-2991

7.3HIGH

Key Information:

Vendor

WordPress
Status
Kivicare – Clinic & Patient Management System (ehr)
Vendor
CVE Published:
18 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2991?

The KiviCare – Clinic & Patient Management System for WordPress has a critical vulnerability that allows attackers to bypass authentication checks. The flaw exists in the patientSocialLogin() function, which does not properly verify the access token provided by social providers. As a result, an unauthenticated user can log in as any patient by simply supplying their email address along with any arbitrary value as the access token. This exposes sensitive medical records, appointments, prescriptions, and personal billing information to unauthorized individuals. Furthermore, the authentication cookies are prematurely set, potentially allowing access even to non-patient users despite receiving a 403 response, which further complicates the security landscape of the system.

Affected Version(s)

KiviCare – Clinic & Patient Management System (EHR) 0 <= 4.1.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-2991
Created by joshuavanderpoll

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/kivicare-clini...
https://plugins.trac.wordpress.org/browser/kivicare-clini...

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gibran Abdillah
.