What is CVE-2019-3966?

CVE-2019-3966 is a medium-severity vulnerability in Open-Emr Openemr, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-20.

How severe is CVE-2019-3966?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Open-Emr Openemr

CVE-2019-3966

In OpenEMR 5.0.1 and earlier, controller.php contains a reflected XSS vulnerability in the foreign_id parameter. This could allow an attacker to execute arbitrary code in the context of a user's session.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.013 (70.3th percentile), scored 2026-10-26.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Open-Emr Openemr
Openemr — versions 5.0.1 and earlier

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.tenable.com/security/research/tra-2019-40 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-3966?: CVE-2019-3966 is a medium-severity vulnerability in Open-Emr Openemr, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-20.
How severe is CVE-2019-3966?: Medium severity. CVSS v3 base score is 6.1 out of 10.