CVE-2021-25917 : Vulnerability Insights and Analysis

OpenEMR versions 5.0.2 to 6.0.0 are susceptible to Stored Cross-Site-Scripting (XSS) attacks, allowing highly privileged attackers to inject arbitrary code through user input fields during new user creation.

Understanding CVE-2021-25917

This CVE involves a security vulnerability in the U2F USB Device authentication method page of OpenEMR versions 5.0.2 to 6.0.0, enabling attackers to execute malicious JavaScript code through improper user input validation.

What is CVE-2021-25917?

OpenEMR versions 5.0.2 to 6.0.0 have a flaw that permits stored Cross-Site-Scripting (XSS) attacks, where an attacker with high privileges can insert malicious code via input fields during the creation of a new user.

The Impact of CVE-2021-25917

The vulnerability exposes sensitive data as attackers can utilize this XSS flaw to execute arbitrary code on the targeted OpenEMR system, potentially leading to data theft, unauthorized access, and further compromise of the affected systems.

Technical Details of CVE-2021-25917

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability arises due to inadequate input validation in OpenEMR versions 5.0.2 to 6.0.0, allowing attackers to inject malicious scripts through user input fields.

Affected Systems and Versions

OpenEMR versions 5.0.2 to 6.0.0 are confirmed to be impacted by this XSS vulnerability.

Exploitation Mechanism

By utilizing the XSS vulnerability in OpenEMR, a malicious actor can execute arbitrary code on the system through specially crafted user inputs.

Mitigation and Prevention

Preventive measures to safeguard systems from CVE-2021-25917.

Immediate Steps to Take

Apply the latest security patches released by OpenEMR promptly to address this vulnerability.
Regularly monitor user inputs and validate them properly to prevent XSS attacks.

Long-Term Security Practices

Conduct regular security audits and penetration testing to proactively identify and address vulnerabilities.
Educate staff members on the importance of securely handling user input data to mitigate XSS risks.

Patching and Updates

Stay informed about security advisories and updates from OpenEMR to apply patches as soon as they are available for enhanced system security.