CVE-2018-20877 : Vulnerability Insights and Analysis

cPanel before version 74.0.8 has a security vulnerability in its WHM Style Upload interface that can be exploited for self-cross-site scripting (XSS).

Understanding CVE-2018-20877

This CVE identifies a specific security issue in cPanel software.

What is CVE-2018-20877?

cPanel prior to version 74.0.8 is susceptible to self XSS in the WHM Style Upload interface (SEC-437).

The Impact of CVE-2018-20877

The vulnerability allows attackers to execute malicious scripts in the context of the user's session, potentially leading to unauthorized actions.

Technical Details of CVE-2018-20877

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in cPanel before version 74.0.8 enables self-cross-site scripting (XSS) through the WHM Style Upload interface (SEC-437).

Affected Systems and Versions

Product: cPanel
Vendor: cPanel
Versions affected: Prior to 74.0.8

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the WHM Style Upload interface, leading to XSS attacks.

Mitigation and Prevention

Protective measures to address CVE-2018-20877.

Immediate Steps to Take

Upgrade cPanel to version 74.0.8 or newer to mitigate the vulnerability.
Regularly monitor for any suspicious activities on the WHM Style Upload interface.

Long-Term Security Practices

Educate users on safe browsing habits to prevent XSS attacks.
Implement content security policies to reduce the risk of script injections.

Patching and Updates

Stay updated with cPanel security advisories and promptly apply patches to address known vulnerabilities.