CVE-2026-40507

OpenEMR before 8.3.0 contains a reflected cross-site scripting vulnerability in the patient portal template import handler. The templateHtml GET parameter is reflected into the page response without sanitization. An attacker can craft a URL that executes arbitrary JavaScript in the browser of any authenticated user with Forms Administration permissions who visits the link, enabling session hijacking.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff899e
https://github.com/openemr/openemr/releases/tag/v8_3_0
https://github.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463g
https://www.vulncheck.com/advisories/openemr-reflected-xss-via-templatehtml-parameter-in-patient-portal
https://github.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463g

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-19 15:17

Updated : 2026-09-09 20:40

NVD link : CVE-2026-40507

Mitre link : CVE-2026-40507

CVE.ORG link : CVE-2026-40507

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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