CVE-2021-27367 : Vulnerability Insights and Analysis

This article provides an overview of CVE-2021-27367, a vulnerability found in Bolt before version 4.1.13 that allows Directory Traversal.

Understanding CVE-2021-27367

CVE-2021-27367 is a security vulnerability that affects Controller/Backend/FileEditController.php and Controller/Backend/FilemanagerController.php in the Bolt platform before version 4.1.13, enabling Directory Traversal attacks.

What is CVE-2021-27367?

CVE-2021-27367 is a vulnerability that permits attackers to navigate through directory structures to access files and directories that are outside the web root directory.

The Impact of CVE-2021-27367

The exploitation of this vulnerability can lead to unauthorized access to sensitive files and data, potentially compromising the security and integrity of the affected system.

Technical Details of CVE-2021-27367

The technical details of CVE-2021-27367 include:

Vulnerability Description

The vulnerability exists in the FileEditController.php and FilemanagerController.php files in Bolt versions earlier than 4.1.13, allowing attackers to perform Directory Traversal attacks.

Affected Systems and Versions

Bolt versions prior to 4.1.13 are affected by this vulnerability, exposing systems running these versions to the risk of exploitation.

Exploitation Mechanism

By manipulating file paths in requests to the affected controllers, attackers can bypass security restrictions and access files and directories outside the intended scope.

Mitigation and Prevention

To address CVE-2021-27367, consider the following mitigation strategies:

Immediate Steps to Take

Update Bolt to version 4.1.13 or later to mitigate the vulnerability.
Restrict access to the vulnerable controllers to trusted users only.

Long-Term Security Practices

Regularly monitor and audit file access and system logs for any suspicious activities.
Implement access control mechanisms to limit directory traversal capabilities.

Patching and Updates

Keep Bolt up to date with the latest security patches and updates to ensure known vulnerabilities are addressed promptly.