CVE-2018-20918 : Security Advisory and Response

A stored cross-site scripting vulnerability in WHM DNS Cluster in cPanel versions before 70.0.23 allows arbitrary code execution.

Understanding CVE-2018-20918

This CVE involves a security issue in cPanel that could lead to the execution of arbitrary code.

What is CVE-2018-20918?

cPanel versions prior to 70.0.23 are susceptible to a stored cross-site scripting vulnerability in WHM DNS Cluster, identified as SEC-372.

The Impact of CVE-2018-20918

The vulnerability could allow attackers to execute arbitrary code, potentially leading to unauthorized access or data manipulation.

Technical Details of CVE-2018-20918

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in cPanel before version 70.0.23 enables stored XSS in WHM DNS Cluster (SEC-372).

Affected Systems and Versions

Product: cPanel
Versions Affected: Prior to 70.0.23

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the WHM DNS Cluster, which may then be executed within the cPanel environment.

Mitigation and Prevention

Protecting systems from CVE-2018-20918 is crucial to maintaining security.

Immediate Steps to Take

Update cPanel to version 70.0.23 or later to mitigate the vulnerability.
Regularly monitor and audit DNS configurations for any unauthorized changes.

Long-Term Security Practices

Implement strict input validation to prevent XSS attacks.
Educate users on safe browsing practices and the risks of executing untrusted code.

Patching and Updates

Stay informed about security updates from cPanel and apply patches promptly to address known vulnerabilities.