CVE-2021-3811 Explained : Impact and Mitigation

Pi-hole/adminlte is vulnerable to Cross-site Scripting (XSS) due to Improper Neutralization of Input During Web Page Generation. This article provides an overview of the CVE-2021-3811 vulnerability.

Understanding CVE-2021-3811

This section delves into the details of the CVE-2021-3811 vulnerability in Pi-hole/adminlte.

What is CVE-2021-3811?

CVE-2021-3811 involves a Cross-site Scripting (XSS) vulnerability in pi-hole/adminlte, allowing attackers to inject malicious scripts into web pages viewed by other users.

The Impact of CVE-2021-3811

The vulnerability poses a medium-severity risk, with high impact on confidentiality, integrity, and availability. Attackers with high privileges can exploit it without user interaction.

Technical Details of CVE-2021-3811

This section covers the technical aspects of CVE-2021-3811.

Vulnerability Description

The vulnerability arises from Improper Neutralization of Input During Web Page Generation, enabling XSS attacks in pi-hole/adminlte.

Affected Systems and Versions

Pi-hole/adminlte versions prior to 5.6 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this XSS vulnerability locally, without user interaction, and with high attack complexity.

Mitigation and Prevention

Understand how to mitigate and prevent the CVE-2021-3811 vulnerability in Pi-hole/adminlte.

Immediate Steps to Take

Users should update to version 5.6 or higher to patch the vulnerability. It is also recommended to sanitize input and output to prevent XSS attacks.

Long-Term Security Practices

Implement input validation, output encoding, and security controls to mitigate XSS vulnerabilities in web applications.

Patching and Updates

Regularly update Pi-hole/adminlte to the latest versions and follow secure coding practices to prevent XSS security threats.