CVE-2021-44618 : Security Advisory and Response

A Server-side Template Injection (SSTI) vulnerability exists in Nystudio107 Seomatic 3.4.12 in src/helpers/UrlHelper.php via the host header.

Understanding CVE-2021-44618

This CVE involves a Server-side Template Injection vulnerability in Nystudio107 Seomatic 3.4.12.

What is CVE-2021-44618?

Server-side Template Injection (SSTI) vulnerability in Nystudio107 Seomatic 3.4.12 allows exploitation via the host header.

The Impact of CVE-2021-44618

The vulnerability could lead to unauthorized access, data leaks, or arbitrary code execution on the affected system.

Technical Details of CVE-2021-44618

This section provides detailed technical information about the CVE.

Vulnerability Description

SSTI vulnerability in Nystudio107 Seomatic 3.4.12 through src/helpers/UrlHelper.php via the host header.

Affected Systems and Versions

Affected version: 3.4.12
Products and vendors: Not applicable

Exploitation Mechanism

The exploit can be triggered by manipulating the host header, allowing an attacker to perform SSTI.

Mitigation and Prevention

Protective measures to address the CVE.

Immediate Steps to Take

Update to the latest unaffected version of Nystudio107 Seomatic.
Implement input validation to sanitize user inputs.
Monitor and restrict external access to the application.

Long-Term Security Practices

Conduct regular security assessments and audits of your applications.
Educate developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Check for security updates regularly and apply patches promptly to mitigate known vulnerabilities.