CVE-2021-3767 : Vulnerability Insights and Analysis

A detailed overview of CVE-2021-3767, a Cross-site Scripting (XSS) vulnerability affecting bookstackapp/bookstack.

Understanding CVE-2021-3767

This section delves into the specifics of the CVE-2021-3767 vulnerability found in bookstackapp/bookstack.

What is CVE-2021-3767?

The vulnerability involves Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in bookstackapp/bookstack.

The Impact of CVE-2021-3767

With a CVSS base score of 5.4, rated as MEDIUM severity, this vulnerability can lead to Cross-site Scripting attacks with low confidentiality and integrity impact.

Technical Details of CVE-2021-3767

Explore the technical aspects of CVE-2021-3767 below.

Vulnerability Description

The vulnerability arises due to Improper Neutralization of Input During Web Page Generation, specifically related to Cross-site Scripting.

Affected Systems and Versions

The vulnerability affects versions of bookstackapp/bookstack that are less than 21.08.2, including unspecified custom versions.

Exploitation Mechanism

The attack complexity is low with a network-based attack vector, minimal user interaction required, and low privileges necessary for exploitation.

Mitigation and Prevention

Discover how to mitigate the risks associated with CVE-2021-3767.

Immediate Steps to Take

Users are advised to apply security patches promptly, monitor for any suspicious activities, and enhance web security controls.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and educate users on recognizing and reporting XSS vulnerabilities.

Patching and Updates

Stay updated with security advisories, follow vendor recommendations for patches, and maintain a robust incident response plan to address any future vulnerabilities effectively.