CVE-2017-18418 : Security Advisory and Response

cPanel versions prior to 66.0.2 are susceptible to stored cross-site scripting (XSS) attacks when performing file operations in WHM cPAddons (SEC-265).

Understanding CVE-2017-18418

cPanel before 66.0.2 allows stored XSS during WHM cPAddons file operations (SEC-265).

What is CVE-2017-18418?

This CVE identifies a vulnerability in cPanel versions before 66.0.2 that enables stored cross-site scripting (XSS) attacks when conducting file operations within WHM cPAddons.

The Impact of CVE-2017-18418

The vulnerability could allow an attacker to execute malicious scripts in the context of an authenticated user, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2017-18418

Vulnerability Description

Stored XSS vulnerability in cPanel versions prior to 66.0.2

Affected Systems and Versions

Affected: cPanel versions before 66.0.2

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into file operations in WHM cPAddons.

Mitigation and Prevention

Immediate Steps to Take

Upgrade cPanel to version 66.0.2 or newer to mitigate the vulnerability
Regularly monitor and audit file operations within WHM cPAddons

Long-Term Security Practices

Implement strict input validation to prevent XSS attacks
Educate users on safe file handling practices

Patching and Updates

Stay informed about security updates and promptly apply patches to ensure system security