CVE-2026-33911
Medium
Description
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductOpen-emr Openemr
PublishedMar 25, 2026
First seenMar 25, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- open-emr openemr8.0.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| open-emr openemr | v < 8.0.0.3 | 8.0.0.3 |
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