CVE-2021-23263 : Security Advisory and Response

This article provides details about CVE-2021-23263, a vulnerability in Crafter CMS that allows unauthenticated remote attackers to read textual content via FreeMarker, including sensitive files. It was published on December 1, 2021.

Understanding CVE-2021-23263

This section delves into the nature of the vulnerability and its potential impact.

What is CVE-2021-23263?

The CVE-2021-23263 vulnerability in Crafter CMS enables unauthenticated remote attackers to access textual content through FreeMarker, potentially compromising confidentiality.

The Impact of CVE-2021-23263

The impact of this vulnerability is rated as 'MEDIUM,' with a CVSS v3.1 base score of 5.9. While the availability impact is considered none, the confidentiality impact is high.

Technical Details of CVE-2021-23263

This section provides technical insights into the vulnerability.

Vulnerability Description

Unauthenticated remote attackers can exploit the CVE-2021-23263 vulnerability to read textual content via FreeMarker, including sensitive files within certain directories.

Affected Systems and Versions

Crafter CMS versions prior to 3.1.15 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability allows attackers to access files in specific paths like /scripts/, /templates/, and certain files in /.git/* directory non-binarily.

Mitigation and Prevention

This section outlines steps to mitigate and prevent exploitation of CVE-2021-23263.

Immediate Steps to Take

Users should update Crafter CMS to version 3.1.15 or above to mitigate the vulnerability. Additionally, restricting access to sensitive directories is recommended.

Long-Term Security Practices

Implement secure coding practices, regular security audits, and monitoring for unauthorized access to prevent such vulnerabilities.

Patching and Updates

Regularly check for security updates and patches released by Crafter Software to address vulnerabilities like CVE-2021-23263.