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CVE-2020-5728 : Security Advisory and Response

Learn about CVE-2020-5728 affecting OpenMRS 2.9 and earlier versions, allowing Cross-Site Scripting attacks. Find mitigation steps and best practices for enhanced system security.

OpenMRS 2.9 and prior versions are vulnerable to a Cross-Site Scripting (XSS) attack due to insufficient validation of the 'redirectUrl' parameter, which copies 'Referrer' header values into HTML elements.

Understanding CVE-2020-5728

OpenMRS 2.9 and earlier versions are susceptible to a specific type of security vulnerability known as Cross-Site Scripting (XSS).

What is CVE-2020-5728?

This CVE refers to a flaw in OpenMRS versions 2.9 and prior that allows malicious actors to execute arbitrary scripts in a victim's browser, potentially compromising user data and system integrity.

The Impact of CVE-2020-5728

The vulnerability in OpenMRS can lead to unauthorized access, data theft, and manipulation of user sessions, posing a significant risk to the confidentiality and integrity of sensitive information.

Technical Details of CVE-2020-5728

OpenMRS 2.9 and earlier versions have the following technical details:

Vulnerability Description

        The 'redirectUrl' parameter in OpenMRS copies 'Referrer' header values without adequate validation, enabling XSS attacks.

Affected Systems and Versions

        Product: OpenMRS
        Versions Affected: 2.90 and prior

Exploitation Mechanism

        Attackers can inject malicious scripts into the 'redirectUrl' parameter, which gets executed in the context of a user's session, leading to XSS exploitation.

Mitigation and Prevention

To address CVE-2020-5728, consider the following steps:

Immediate Steps to Take

        Update OpenMRS to a patched version that includes proper validation of user input.
        Implement input sanitization and output encoding to mitigate XSS risks.

Long-Term Security Practices

        Conduct regular security assessments and code reviews to identify and remediate vulnerabilities promptly.
        Educate developers and users about secure coding practices and the risks associated with XSS attacks.

Patching and Updates

        Stay informed about security advisories and updates from OpenMRS to apply patches promptly and ensure system security.

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