Stored XSS Vulnerability in OpenEMR Affects Patient Portal Logins
CVE-2026-33303

5.4MEDIUM

Key Information:

Vendor

Openemr

Status
Openemr
Vendor
CVE Published:
19 March 2026

What is CVE-2026-33303?

A vulnerability exists in OpenEMR prior to version 8.0.0.2, allowing stored cross-site scripting (XSS) through the portal_login_username field. An attacker can exploit this by setting their login username to an XSS payload. This payload executes in the browser of clinic staff when they access the 'Create Portal Login' page for the affected patient, thereby damaging the security of the patient and clinic's web sessions. The latest version, 8.0.0.2, addresses this vulnerability.

Affected Version(s)

openemr < 8.0.0.2

References

https://github.com/openemr/openemr/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/openemr/openemr/commit/c32139b5144b1c7...
x_refsource_MISC

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.