CVE-2021-27907 : Vulnerability Insights and Analysis

Apache Superset up to version 0.38.0 allowed the creation of a Markdown component on a Dashboard page, enabling a malicious user to inject JavaScript code. This could lead to the execution of unwanted actions in the user's browser, posing a stored XSS vulnerability.

Understanding CVE-2021-27907

In this section, we will delve into the details of CVE-2021-27907 to understand the impact, affected systems, and mitigation strategies.

What is CVE-2021-27907?

CVE-2021-27907 refers to a stored XSS vulnerability in Apache Superset versions up to and including 0.38.0. By creating a Markdown component on a Dashboard page, a malicious user could inject JavaScript code to perform unauthorized actions in the user's browser.

The Impact of CVE-2021-27907

The exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of a legitimate user's browser, leading to potential data theft, account compromise, and other malicious activities.

Technical Details of CVE-2021-27907

Let's explore the technical aspects of CVE-2021-27907, including vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

Apache Superset's vulnerability arises from the creation of a Markdown component on a Dashboard page. By injecting JavaScript code into a 'div' section embedded with an 'svg' element, malicious actors can trigger the execution of unauthorized actions in the user's browser.

Affected Systems and Versions

The affected product is Apache Superset, specifically versions up to and including 0.38.0, developed by the Apache Software Foundation.

Exploitation Mechanism

Exploiting this vulnerability involves creating a 'div' section and embedding a 'svg' element containing JavaScript code, allowing unauthorized actions to be executed in the context of a user's browser.

Mitigation and Prevention

To address CVE-2021-27907 and enhance system security, certain immediate steps can be taken, supplemented by long-term security practices and the importance of timely patching and updates.

Immediate Steps to Take

Immediately disable the creation of Markdown components on Apache Superset's Dashboard pages and restrict access to potentially vulnerable features. Educate users about potential risks associated with stored XSS vulnerabilities.

Long-Term Security Practices

Implement strict input validation mechanisms, sanitize user inputs, and conduct regular security audits to identify and mitigate similar vulnerabilities in the future.

Patching and Updates

Stay informed about security advisories from Apache Superset and promptly apply patches and updates to ensure that known vulnerabilities are addressed in a timely manner.