CVE-2019-3963 : Security Advisory and Response

OpenEMR 5.0.1 and earlier versions contain a reflected XSS vulnerability in the patient_id parameter of controller.php, allowing attackers to execute arbitrary code and access user sessions.

Understanding CVE-2019-3963

A Cross-Site Scripting (XSS) vulnerability in OpenEMR that poses a risk of code execution within user sessions.

What is CVE-2019-3963?

This CVE identifies a reflected XSS flaw in OpenEMR versions 5.0.1 and earlier, specifically in the patient_id parameter of controller.php.

The Impact of CVE-2019-3963

Exploiting this vulnerability could enable malicious actors to execute arbitrary code within a user's session, potentially compromising sensitive data.

Technical Details of CVE-2019-3963

OpenEMR version 5.0.1 and earlier are susceptible to a reflected XSS vulnerability in the patient_id parameter of controller.php.

Vulnerability Description

A reflected XSS vulnerability in OpenEMR allows attackers to execute arbitrary code within a user's session.

Affected Systems and Versions

Product: OpenEMR
Versions affected: 5.0.1 and earlier

Exploitation Mechanism

The vulnerability lies in the patient_id parameter of controller.php, enabling attackers to inject and execute malicious code.

Mitigation and Prevention

Immediate action and long-term security practices are crucial to mitigate the risks associated with CVE-2019-3963.

Immediate Steps to Take

Update OpenEMR to the latest version to patch the vulnerability.
Implement input validation mechanisms to sanitize user inputs and prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and audit web application code for vulnerabilities.
Educate users and developers on secure coding practices to prevent XSS vulnerabilities.

Patching and Updates

Apply security patches and updates provided by OpenEMR to address the XSS vulnerability.