2026-02-27 16:44:40
GitHub_M
PUBLISHED
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0, in `portal/portal_payment.php`, the patient id used for the page is taken from the request (`$pid = $_REQUEST[pid] ?? $pid` and `$pid = ($_REQUEST[hidden_patient_code] ?? null) > 0 ? $_REQUEST[hidden_patient_code] : $pid`) instead of being fixed to the authenticated portal user. The portal session already has a valid `$pid` for the logged-in patient. Overwriting it with user-supplied values and using it without authorization allows a portal user to view and interact with another patients demographics, invoices, and payment history—horizontal privilege escalation and IDOR. Version 8.0.0 contains a fix for the issue.