CVE-2021-25922 : Vulnerability Insights and Analysis

OpenEMR, versions 4.2.0 to 6.0.0, are vulnerable to Reflected Cross-Site-Scripting (XSS) due to user input not being properly validated, allowing attackers to execute malicious code through a malicious URL.

Understanding CVE-2021-25922

This CVE affects OpenEMR versions 4.2.0 to 6.0.0, exposing them to Reflected Cross-Site-Scripting (XSS) attacks.

What is CVE-2021-25922?

In OpenEMR, versions 4.2.0 to 6.0.0 are susceptible to a Reflected Cross-Site-Scripting (XSS) vulnerability, enabling an attacker to execute malicious code by manipulating user input.

The Impact of CVE-2021-25922

The vulnerability in OpenEMR can be exploited by tricking users into clicking on specially crafted URLs, leading to the execution of malicious scripts and potentially compromising sensitive information.

Technical Details of CVE-2021-25922

OpenEMR versions 4.2.0 to 6.0.0 lack proper validation of user input, making them prone to Reflected Cross-Site-Scripting (XSS) attacks.

Vulnerability Description

The vulnerability allows attackers to insert malicious scripts into URLs, which are then executed when accessed by unsuspecting users, potentially leading to unauthorized data access or compromise.

Affected Systems and Versions

OpenEMR versions affected by CVE-2021-25922 include 4.2.0, 4.2.0.3, 4.2.1, 4.2.2, 5.0.0, 5.0.0.5, 5.0.0.6, 5.0.1, 5.0.1.1, 5.0.1.2, 5.0.1.3, 5.0.1.4, 5.0.1.5, 5.0.1.6, 5.0.1.7, 5.0.2, 5.0.2.1, 5.0.2.2, 5.0.2.3, 5.0.2.4, and 6.0.0.

Exploitation Mechanism

Attackers can craft URLs containing malicious scripts and distribute them through various channels to trick users into clicking on them. Once clicked, the malicious code is executed within the context of the user's session, potentially leading to data breaches.

Mitigation and Prevention

To address CVE-2021-25922, immediate steps should be taken to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

Users of OpenEMR should apply security patches provided by the vendor to address the XSS vulnerability and prevent potential exploitation. Additionally, users should be cautious when clicking on links, especially from untrusted sources.

Long-Term Security Practices

Regular security updates and patches should be applied to OpenEMR installations to protect against known vulnerabilities and ensure a secure environment.

Patching and Updates

Stay informed about security advisories and updates from OpenEMR to promptly apply patches and maintain the security of your system.