CVE-2020-26113 : Security Advisory and Response

cPanel before 90.0.10 allows self XSS via WHM Manage API Tokens interfaces (SEC-569).

Understanding CVE-2020-26113

This CVE involves a vulnerability in cPanel that enables self XSS through WHM Manage API Tokens interfaces.

What is CVE-2020-26113?

CVE-2020-26113 is a security vulnerability in cPanel versions prior to 90.0.10 that allows for self XSS via WHM Manage API Tokens interfaces.

The Impact of CVE-2020-26113

This vulnerability could be exploited by 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-2020-26113

The technical aspects of this CVE are as follows:

Vulnerability Description

Vulnerability Type: Self XSS
Vulnerable Component: WHM Manage API Tokens interfaces

Affected Systems and Versions

Affected Systems: cPanel versions before 90.0.10
Affected Components: WHM Manage API Tokens interfaces

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting and executing malicious scripts within the user's session, leading to potential security breaches.

Mitigation and Prevention

To address CVE-2020-26113, consider the following steps:

Immediate Steps to Take

Update cPanel to version 90.0.10 or later to mitigate the vulnerability.
Regularly monitor and review API access and token usage within WHM.

Long-Term Security Practices

Educate users on safe browsing practices to prevent XSS attacks.
Implement strict input validation and output encoding to prevent script injection.

Patching and Updates

Stay informed about security updates and patches released by cPanel.
Apply updates promptly to ensure the latest security fixes are in place.