Vulnerability Report

CVE-2026-33346

Title: Stored XSS in OpenEMR patient portal payment flow

XSS

Proof Of Concept

No public PoC currently indexed for CVE-2026-33346.

CWE Category CWE-79
Published Date Mar 19, 2026
Modified Date Mar 20, 2026
Exploit Status Not Found
Score 8.7 CVSS v3.1
Exploit Probability (EPSS)
0.32%

Vulnerability Summary

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.

Impacted Vendors

O
open-emr 1
O
openemr 1

Reference Links

https://github.com/openemr/openemr/commit/6e9e1566d6e271a6d839614674b887e3a73d7da1 https://github.com/openemr/openemr/security/advisories/GHSA-qvf6-6xc6-9qv7
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.7
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-33346 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Affected Stack

No specific products linked.