What is CVE-2026-33346?

CVE-2026-33346 is a high-severity vulnerability in Open-Emr Openemr, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-03-19.

How severe is CVE-2026-33346?

High severity. CVSS v3 base score is 8.7 out of 10.

XSS in Open-Emr Openemr

CVE-2026-33346

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, a stored cross-site scripting (XSS) vulnerability in the patient portal payment flow allows a patient portal user to persist arbitrary JavaScript that executes in the browser of a staff member who reviews the payment submission. The payload is stored via `portal/lib/paylib.php` and rendered without escaping in `portal/portal_payment.php`. Version 8.0.0.2 fixes the issue.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (24.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Open-emr Openemr
Openemr — versions < 8.0.0.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33346?: CVE-2026-33346 is a high-severity vulnerability in Open-Emr Openemr, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-03-19.
How severe is CVE-2026-33346?: High severity. CVSS v3 base score is 8.7 out of 10.