CVE-2026-2991

| EUVD-2026-12838 HIGH
2026-03-18 Wordfence
7.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

3
Analysis Generated
Mar 18, 2026 - 15:45 vuln.today
EUVD ID Assigned
Mar 18, 2026 - 15:45 euvd
EUVD-2026-12838
CVE Published
Mar 18, 2026 - 15:28 nvd
HIGH 7.3

Tags

WordPress Authentication Bypass

Description

The KiviCare - Clinic & Patient Management System (EHR) plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 4.1.2. This is due to the `patientSocialLogin()` function not verifying the social provider access token before authenticating a user. This makes it possible for unauthenticated attackers to log in as any patient registered on the system by providing only their email address and an arbitrary value for the access token, bypassing all credential verification. The attacker gains access to sensitive medical records, appointments, prescriptions, and billing information (PII/PHI breach). Additionally, authentication cookies are set before the role check, meaning the auth cookies for non-patient users (including administrators) are also set in the HTTP response headers, even though a 403 response is returned.

Analysis

The KiviCare Clinic & Patient Management System (EHR) plugin for WordPress contains a critical authentication bypass vulnerability allowing unauthenticated attackers to log in as any patient by simply providing their email address and an arbitrary access token value. All versions up to and including 4.1.2 are affected, exposing sensitive medical records, appointments, prescriptions, and billing information (PII/PHI). …

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Remediation

Within 24 hours: Disable the KiviCare plugin immediately and switch patient portals to an alternative system or take the plugin offline entirely; audit access logs for unauthorized login attempts; notify your legal and compliance teams. Within 7 days: Conduct a forensic investigation to determine if the vulnerability was exploited, review patient records for unauthorized access or modification, and prepare breach notification procedures if compromise is confirmed. …

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Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: +0.2
CVSS: +36
POC: 0

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CVE-2026-2991 vulnerability details – vuln.today
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