CVE-2021-27237 : Vulnerability Insights and Analysis

This article provides details about CVE-2021-27237, a vulnerability in BlackCat CMS 1.3.6 that allows stored cross-site scripting (XSS) attacks via the Display Name field in backend/preferences/ajax_save.php.

Understanding CVE-2021-27237

CVE-2021-27237 is a security vulnerability that enables malicious administrators to execute stored XSS attacks by manipulating the Display Name field within the BlackCat CMS admin panel.

What is CVE-2021-27237?

The vulnerability in BlackCat CMS 1.3.6 allows attackers with admin privileges to inject and execute malicious scripts using the Display Name field in the specified backend PHP file.

The Impact of CVE-2021-27237

The impact of this vulnerability is significant as it can lead to unauthorized access, data theft, and the execution of malicious code within the CMS, compromising the security and integrity of the system.

Technical Details of CVE-2021-27237

The following technical details outline the specifics of CVE-2021-27237:

Vulnerability Description

The vulnerability resides in the admin panel of BlackCat CMS 1.3.6, enabling stored XSS attacks via the Display Name field in backend/preferences/ajax_save.php.

Affected Systems and Versions

All instances of BlackCat CMS 1.3.6 are affected by this vulnerability, allowing any admin user to exploit it.

Exploitation Mechanism

By manipulating the Display Name field in the specified PHP file, admin users can insert malicious scripts that get executed within the CMS, leading to a successful XSS attack.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-27237, consider the following steps:

Immediate Steps to Take

Update BlackCat CMS to a patched version that addresses the vulnerability.
Restrict admin access and permissions to minimize the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit admin activities within the CMS.
Educate administrators on secure coding practices and the risks of XSS vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by the BlackCat CMS development team to promptly address vulnerabilities and enhance system security.