CVE-2026-33911: OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, the POST parameter `title`…

PriorityP428medium5.4CVSS 3.1

AVNACLPRLUIRSCCLILAN

EPSS

0.23%

13.6th percentile

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, the POST parameter `title` is reflected back in a JSON response built with `json_encode()`. Because the response is served with a `text/html` Content-Type, the browser interprets injected HTML/script tags rather than treating the output as JSON. An authenticated attacker can craft a request that executes arbitrary JavaScript in a victim's session. Version 8.0.0.3 contains a fix.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
open-emr	openemr	< 8.0.0.3	8.0.0.3
openemr	openemr	< 8.0.0.3	8.0.0.3

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