KiviCare – Clinic & Patient Management System (EHR) <= 4.1.2 - Unauthenticated Authentication Bypass via Social Login Token
Title source: cnaExploitation Summary
EIP tracks 3 public exploits for CVE-2026-2991. PoCs published by joshuavanderpoll, XZ1r0, Jumpthereness578.
AI-analyzed exploit summary This repository contains a functional Python exploit for CVE-2026-2991, an authentication bypass vulnerability in the KiviCare Clinic & Patient Management System WordPress plugin. The exploit leverages a flawed social login endpoint to bypass authentication and obtain valid session cookies for any registered patient or, in some cases, other user roles.
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.
Exploits (3)
This repository contains a functional Python exploit for CVE-2026-2991, an authentication bypass vulnerability in the KiviCare Clinic & Patient Management System WordPress plugin. The exploit leverages a flawed social login endpoint to bypass authentication and obtain valid session cookies for any registered patient or, in some cases, other user roles.
This repository contains a functional Python exploit for CVE-2026-2991, an authentication bypass vulnerability in the KiviCare Clinic & Patient Management System WordPress plugin (versions <= 4.1.2). The exploit leverages a flawed social login endpoint to bypass authentication and obtain session cookies for any registered patient or, in some cases, other user roles.
This repository contains a functional Python exploit for CVE-2026-2991, an authentication bypass vulnerability in the KiviCare Clinic & Patient Management System WordPress plugin. The exploit leverages a flawed social login endpoint to bypass authentication and obtain session cookies for any registered patient or admin account.
References (4)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L