CVE-2026-126424
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Stored XSS in OpenEMR via SNOMED Code Injection

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
OpenEMR before 8.5.0 contains a stored cross-site scripting vulnerability that allows users with admin/superbill write permission to inject HTML into SNOMED code descriptions via superbill_custom_full.php. When a clinician selects the malicious code, the Functional and Cognitive Status form or fee-sheet forms assign it to innerHTML, executing JavaScript in the clinician's session to read patient data and perform actions.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-126424
EUVD
EUVD-2026-125019

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openemr openemr to 8.5.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in OpenEMR versions before 8.5.0. A user with admin or superbill write permissions can inject malicious HTML into SNOMED code descriptions. When a clinician selects this code, it executes JavaScript in their authenticated session via innerHTML in forms like Functional and Cognitive Status or fee-sheet forms.

Detection Guidance

Check OpenEMR version for versions before 8.5.0. Inspect billing code descriptions in superbill_custom_full.php for unexpected HTML/JavaScript content. Review clinician interactions with Functional and Cognitive Status or fee-sheet forms for unusual behavior.

Impact Analysis

An attacker could read patient data or perform unauthorized actions in the clinician's OpenEMR session. This requires the attacker to have admin/superbill write permissions and the clinician to interact with affected forms. The impact is limited by the need for high privileges and user interaction.

Compliance Impact

This vulnerability could lead to unauthorized access or modification of patient data, violating HIPAA's confidentiality requirements. GDPR compliance may also be affected due to potential unauthorized processing of personal data. Organizations using vulnerable OpenEMR versions should patch immediately to maintain compliance.

Mitigation Strategies

Upgrade OpenEMR to version 8.5.0 or later immediately. Remove admin/superbill write permissions from untrusted users until patching is complete. Audit billing code descriptions for malicious HTML/JavaScript and sanitize any untrusted inputs.

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