CVE-2018-20878 : Security Advisory and Response

An issue was identified in versions of cPanel prior to 74.0.8, allowing for stored cross-site scripting (XSS) in the "File and Directory Restoration" interface in WHM (Web Host Manager).

Understanding CVE-2018-20878

This CVE refers to a stored XSS vulnerability in cPanel versions before 74.0.8, specifically affecting the "File and Directory Restoration" interface in WHM.

What is CVE-2018-20878?

cPanel versions prior to 74.0.8 are susceptible to stored cross-site scripting (XSS) attacks in the WHM interface, identified as SEC-441.

The Impact of CVE-2018-20878

This vulnerability could allow an attacker to execute malicious scripts in the context of the user's session, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2018-20878

The technical details of this CVE are as follows:

Vulnerability Description

The vulnerability allows for stored cross-site scripting (XSS) attacks in the WHM "File and Directory Restoration" interface.

Affected Systems and Versions

Affected Product: cPanel
Affected Versions: Prior to 74.0.8

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the affected interface, which are then executed in the user's browser.

Mitigation and Prevention

To address CVE-2018-20878, consider the following mitigation strategies:

Immediate Steps to Take

Update cPanel to version 74.0.8 or later to mitigate the vulnerability.
Regularly monitor and review file restorations for any suspicious activities.

Long-Term Security Practices

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

Patching and Updates

Apply security patches and updates promptly to ensure protection against known vulnerabilities.