CVE-2021-44791 Explained : Impact and Mitigation

Apache Druid prior to version 0.23.0 is prone to a reflected cross-site scripting (XSS) vulnerability due to unescaped URL parameters in certain links.

Understanding CVE-2021-44791

This CVE involves a vulnerability in Apache Druid that may allow attackers to execute reflected XSS attacks.

What is CVE-2021-44791?

In Apache Druid versions up to 0.22.1, specially crafted links can lead to unescaped URL parameters being returned in HTML responses, enabling the execution of reflected XSS attacks.

The Impact of CVE-2021-44791

The impact of this vulnerability is considered low.

Technical Details of CVE-2021-44791

This section provides detailed technical insights into the CVE.

Vulnerability Description

The vulnerability allows for the execution of reflected cross-site scripting (XSS) attacks by manipulating certain links in Apache Druid versions prior to 0.23.0.

Affected Systems and Versions

Product: Apache Druid
Vendor: Apache Software Foundation
Versions affected: Apache Druid <= 0.22.1

Exploitation Mechanism

Attackers can craft malicious links to exploit this vulnerability, causing unescaped URL parameters to be sent back in HTML responses and enabling XSS attacks.

Mitigation and Prevention

To safeguard against this vulnerability, certain measures should be taken.

Immediate Steps to Take

Upgrade to Apache Druid 0.23.0 or a later version to mitigate the risk of XSS attacks.

Long-Term Security Practices

Regularly review and sanitize URL parameters in web applications to prevent XSS vulnerabilities.

Patching and Updates

Stay updated with security patches and software upgrades provided by Apache Software Foundation to ensure protection against such vulnerabilities.