What is CVE-2026-33911?

CVE-2026-33911 is a medium-severity vulnerability in Openemr, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-25.

How severe is CVE-2026-33911?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Openemr

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` is reflected back in a JSON response built with `json_encode()`. Because the resp…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (6.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Openemr — versions < 8.0.0.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/openemr/openemr/security/advisories/GHSA-wwhf-6cvc-6766 (x_refsource_CONFIRM)
https://github.com/openemr/openemr/commit/64e8befa0a49f85dd5e2a85c91f3f8b9e565896f (x_refsource_MISC)
https://github.com/openemr/openemr/releases/tag/v8_0_0_3 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33911?: CVE-2026-33911 is a medium-severity vulnerability in Openemr, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-25.
How severe is CVE-2026-33911?: Medium severity. CVSS v3 base score is 5.4 out of 10.