CVE-2026-2991 Auth bypass in KiviCare – Clinic & Patient Management System (EHR)
Unauthenticated attackers can bypass authentication to access patient medical records and potentially administrator cookies by exploiting a missing token verification in the social login function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2991?
CVE-2026-2991 is a high-severity authentication bypass vulnerability in iqonicdesign KiviCare – Clinic & Patient Management System (EHR), published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-2991?
How do I fix CVE-2026-2991?
No fix has been published for CVE-2026-2991 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-2991 being exploited?
There is no known exploitation of CVE-2026-2991 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-vgm8-mf6q-65v2.