CVE-2018-20933 : Security Advisory and Response

A Stored XSS vulnerability was identified in cPanel versions prior to 70.0.23, allowing malicious actors to execute scripts in a victim's browser.

Understanding CVE-2018-20933

This CVE involves a security issue in cPanel that could lead to cross-site scripting attacks.

What is CVE-2018-20933?

This CVE refers to a Stored XSS vulnerability in cPanel versions before 70.0.23, specifically via the WHM Edit DNS Zone action (SEC-410).

The Impact of CVE-2018-20933

The vulnerability could be exploited by attackers to inject and execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions.

Technical Details of CVE-2018-20933

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows for the execution of arbitrary scripts in the victim's browser through the WHM Edit DNS Zone action in cPanel versions earlier than 70.0.23.

Affected Systems and Versions

Affected Product: cPanel
Vulnerable Versions: Prior to 70.0.23

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the DNS Zone editing functionality in cPanel, leading to the execution of unauthorized code.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade 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 mechanisms to prevent script injection attacks.
Educate users on safe browsing practices and the risks of executing untrusted scripts.

Patching and Updates

Stay informed about security updates and patches released by cPanel to address known vulnerabilities.