CVE-2018-20899 : Exploit Details and Defense Strategies

A vulnerability in cPanel before version 71.9980.37 allows for stored XSS in the WHM cPAddons installation interface.

Understanding CVE-2018-20899

This CVE involves a security issue in cPanel that could lead to stored XSS attacks.

What is CVE-2018-20899?

The version prior to 71.9980.37 of cPanel has a vulnerability that permits stored XSS in the WHM cPAddons installation interface (SEC-398).

The Impact of CVE-2018-20899

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-2018-20899

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in cPanel before version 71.9980.37 allows for stored XSS in the WHM cPAddons installation interface (SEC-398).

Affected Systems and Versions

Affected Version: Prior to 71.9980.37
Systems: cPanel installations

Exploitation Mechanism

The vulnerability can be exploited by injecting malicious scripts into the WHM cPAddons installation interface, which could then be executed in the context of the user's session.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial.

Immediate Steps to Take

Update cPanel to version 71.9980.37 or newer to patch the vulnerability.
Regularly monitor for any suspicious activities in the WHM cPAddons installation interface.

Long-Term Security Practices

Implement strict input validation to prevent XSS attacks.
Educate users on safe browsing practices to minimize the risk of executing malicious scripts.

Patching and Updates

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