Is CVE-2026-33303 actively exploited?

CVE-2026-33303 has no public evidence of in-the-wild exploitation as of 2026-03-20.

What is the CVSS score for CVE-2026-33303?

CVE-2026-33303 has a CVSS score of 5.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2026-33303?

Patch guidance is available from open-emr security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-33303.

CVE-2026-33303 - remediation guidance & executive summary

Description

OpenEMR is a free and open source electronic health records and medical practice management application. Versions prior to 8.0.0.2 are vulnerable to stored cross-site scripting (XSS) via unescaped `portal_login_username` in the portal credential print view. A patient portal user can set their login username to an XSS payload, which then executes in a clinic staff member's browser when they open the "Create Portal Login" page for that patient. This crosses from the patient session context into the staff/admin session context. Version 8.0.0.2 fixes the issue.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: OPEN-EMR
Published: 3/19/2026
Last Modified: 3/20/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

open-emr : openemr

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-33303. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-33303

View on NIST NVD

CVE-2026-33303 vulnerability