CVE-2018-5233 : Security Advisory and Response

Grav CMS version before 1.3.0 has a cross-site scripting (XSS) vulnerability that allows remote attackers to inject arbitrary web script or HTML.

Understanding CVE-2018-5233

This CVE involves a security issue in Grav CMS that could be exploited by attackers to execute XSS attacks.

What is CVE-2018-5233?

The vulnerability in the Grav CMS system/src/Grav/Common/Twig/Twig.php file enables attackers to insert malicious scripts or HTML by manipulating the PATH_INFO parameter in the admin/tools component.

The Impact of CVE-2018-5233

The XSS vulnerability in Grav CMS before version 1.3.0 poses a risk of remote code execution and potential data theft.

Technical Details of CVE-2018-5233

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

Vulnerability Description

The XSS flaw in Grav CMS allows threat actors to inject unauthorized scripts or HTML code via the PATH_INFO parameter.

Affected Systems and Versions

Product: Grav CMS
Vendor: N/A
Versions affected: All versions before 1.3.0

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the PATH_INFO parameter in the admin/tools component to inject malicious scripts or HTML.

Mitigation and Prevention

Protecting systems from CVE-2018-5233 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Grav CMS to version 1.3.0 or later to mitigate the XSS vulnerability.
Monitor and filter user inputs to prevent malicious script injections.

Long-Term Security Practices

Regularly audit and update web application security measures.
Educate users and developers on secure coding practices to prevent XSS attacks.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.