CVE-2020-12790 : What You Need to Know

In the SEOmatic plugin before 3.2.49 for Craft CMS, a vulnerability exists that could lead to Server-Side Template Injection and credentials disclosure.

Understanding CVE-2020-12790

This CVE involves a security issue in the SEOmatic plugin for Craft CMS that could potentially expose sensitive information.

What is CVE-2020-12790?

The vulnerability in the SEOmatic plugin allows for Server-Side Template Injection and the disclosure of credentials through a specially crafted Twig template.

The Impact of CVE-2020-12790

The vulnerability could be exploited by attackers to inject malicious code and access sensitive data, posing a significant risk to affected systems.

Technical Details of CVE-2020-12790

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue arises from the improper sanitization of URLs in the helpers/DynamicMeta.php file, enabling attackers to perform Server-Side Template Injection.

Affected Systems and Versions

Product: SEOmatic plugin for Craft CMS
Vendor: n/a
Versions affected: All versions before 3.2.49

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious Twig template containing a semicolon, leading to the execution of unauthorized code and potential data exposure.

Mitigation and Prevention

Protecting systems from CVE-2020-12790 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update the SEOmatic plugin to version 3.2.49 or newer to patch the vulnerability.
Monitor system logs for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Regularly audit and review code for security vulnerabilities.
Educate developers on secure coding practices to prevent similar issues in the future.

Patching and Updates

Stay informed about security updates and patches released by the plugin vendor.
Implement a robust patch management process to promptly apply necessary security fixes.