CVE-2021-3758 : Security Advisory and Response

bookstack is vulnerable to Server-Side Request Forgery (SSRF).

Understanding CVE-2021-3758

This CVE refers to a Server-Side Request Forgery (SSRF) vulnerability found in bookstackapp/bookstack.

What is CVE-2021-3758?

CVE-2021-3758 highlights a Server-Side Request Forgery (SSRF) weakness in the bookstack application, allowing attackers to manipulate requests from the server.

The Impact of CVE-2021-3758

With a CVSS base score of 6.3, this vulnerability has a medium severity level, posing a risk of high confidentiality impact but no integrity or availability impact.

Technical Details of CVE-2021-3758

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in bookstackapp/bookstack enables Server-Side Request Forgery (SSRF), indicating a risk of attackers influencing server requests.

Affected Systems and Versions

Versions of bookstack prior to 21.08 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability via a high attack complexity and network-based attack vector with low privileges required.

Mitigation and Prevention

Protecting systems from CVE-2021-3758 is crucial to maintain security.

Immediate Steps to Take

Ensure immediate mitigation by updating bookstack to version 21.08 or newer to eliminate the SSRF vulnerability.

Long-Term Security Practices

Regularly monitor and update your systems, conduct security audits, and educate users to prevent future vulnerabilities.

Patching and Updates

Stay informed about security patches and updates for bookstack to address known vulnerabilities.