CVE-2021-33850 : What You Need to Know

A Cross-Site Scripting vulnerability has been discovered in Microsoft Clarity version 0.3. This vulnerability allows the execution of malicious scripts when changing the configuration within the application.

Understanding CVE-2021-33850

This section provides insights into the nature and impact of the CVE-2021-33850 vulnerability.

What is CVE-2021-33850?

The CVE-2021-33850 is a Cross-Site Scripting (XSS) vulnerability found in Microsoft Clarity version 0.3. Attackers can exploit this vulnerability by injecting malicious scripts that execute when users modify the clarity configuration.

The Impact of CVE-2021-33850

The exploitation of this vulnerability can lead to unauthorized access to sensitive data, session hijacking, defacement of web pages, and other malicious activities by attackers.

Technical Details of CVE-2021-33850

In this section, we delve into the specifics of the CVE-2021-33850 vulnerability.

Vulnerability Description

The XSS payload is triggered whenever changes are made to the clarity configuration in Microsoft Clarity version 0.3. The payload is stored on the configuring project Id page, enabling attackers to execute arbitrary scripts.

Affected Systems and Versions

Microsoft Clarity version 0.3 is specifically impacted by this vulnerability.

Exploitation Mechanism

By manipulating the configuration settings in Microsoft Clarity version 0.3, threat actors can inject malicious scripts that get executed within the application.

Mitigation and Prevention

This section outlines steps to mitigate the risks associated with CVE-2021-33850.

Immediate Steps to Take

Users are advised to update Microsoft Clarity to a secure version, apply patches provided by the vendor, and avoid making changes to the clarity configuration from untrusted sources.

Long-Term Security Practices

Implement a robust web application security testing process, regularly monitor and audit the application for vulnerabilities, and educate users on safe configuration practices to prevent XSS attacks.

Patching and Updates

Stay informed about security updates and patches released by Microsoft for Clarity to address known vulnerabilities and ensure the application is up-to-date with the latest security fixes.