Improper Authorization in OpenEMR Allows Lab Order Transmission

Executive Summary

This vulnerability in OpenEMR before version 8.5.0 allows authenticated users with read-only access to transmit lab orders. The system incorrectly permits order transmission without requiring write permissions, enabling attackers to send HL7 orders containing sensitive patient data like SSNs, insurance details, and diagnoses to external laboratories.

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Detection Guidance

To detect this vulnerability, check OpenEMR versions prior to 8.5.0 by reviewing the installed version in your system. Look for unauthorized lab order transmissions in logs, particularly actions marked as transmitted by read-only users. Inspect interface/orders/list_reports.php for improper access control checks.

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Impact Analysis

An attacker could exploit this to send unauthorized lab orders, potentially exposing sensitive patient data. This may lead to duplicate tests, premature processing of orders, or disruption of legitimate workflows. The attack requires only a read-only account and a queued order.

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Compliance Impact

This vulnerability could violate regulations like HIPAA or GDPR by exposing protected health information (PHI) such as SSNs, insurance details, and diagnoses. Improper authorization may lead to unauthorized data transmission, resulting in compliance breaches and potential legal consequences.

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Mitigation Strategies

Immediately upgrade OpenEMR to version 8.5.0 or later to patch the vulnerability. Review user permissions to ensure read-only accounts cannot transmit lab orders. Monitor lab order logs for suspicious activity and restrict form_xmit submissions to authorized users only.

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