CVE-2021-44667 : Vulnerability Insights and Analysis

This CVE pertains to a Cross Site Scripting vulnerability in Nacos 2.0.3, impacting the auth/users functionality.

Understanding CVE-2021-44667

What is CVE-2021-44667?

A Cross Site Scripting (XSS) vulnerability is identified in Nacos 2.0.3 through the (1) pageSize and (2) pageNo parameters within the auth/users endpoint.

The Impact of CVE-2021-44667

This vulnerability could allow an attacker to execute malicious scripts in the context of an authenticated user, leading to potential data theft, unauthorized actions, and system compromise.

Technical Details of CVE-2021-44667

Vulnerability Description

The XSS flaw in Nacos 2.0.3 enables attackers to inject and execute arbitrary JavaScript code via specific parameters in the auth/users endpoint.

Affected Systems and Versions

Product: Nacos
Version: 2.0.3

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the pageSize and pageNo parameters, injecting malicious scripts to be executed within the user's context.

Mitigation and Prevention

Immediate Steps to Take

Update Nacos to a patched version that addresses the XSS vulnerability.
Avoid clicking on suspicious links or visiting untrusted websites to mitigate potential attacks.

Long-Term Security Practices

Implement input validation mechanisms to sanitize user inputs effectively.
Conduct regular security assessments and code reviews to identify and fix vulnerabilities promptly.

Patching and Updates

Apply security patches from the Nacos project promptly to prevent exploitation of the XSS vulnerability.