CVE-2026-40508

OpenEMR before 8.3.0 contains a stored cross-site scripting vulnerability in the patient portal template import handler that allows authenticated attackers with Forms Administration permissions to upload template files containing arbitrary HTML or JavaScript. Attackers can inject malicious scripts through the template upload functionality, which are stored without sanitization and execute in the browser of any other Forms Administration user who views the template in the HTML editor.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

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-5293-8q47-cf44
https://www.vulncheck.com/advisories/openemr-stored-xss-via-patient-portal-template-import-handler
https://github.com/openemr/openemr/security/advisories/GHSA-5293-8q47-cf44

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-19 15:17

Updated : 2026-09-09 20:40

NVD link : CVE-2026-40508

Mitre link : CVE-2026-40508

CVE.ORG link : CVE-2026-40508

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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