CVE-2020-13870 : What You Need to Know

An issue was discovered in the Comments plugin before 1.5.5 for Craft CMS, leading to stored XSS via an asset volume name.

Understanding CVE-2020-13870

This CVE involves a vulnerability in the Comments plugin for Craft CMS that allows for stored XSS attacks.

What is CVE-2020-13870?

This CVE identifies a security flaw in the Comments plugin before version 1.5.5 for Craft CMS, enabling malicious actors to execute stored XSS attacks through an asset volume name.

The Impact of CVE-2020-13870

The vulnerability could result in unauthorized access to sensitive information, manipulation of content, and potential compromise of user data on affected systems.

Technical Details of CVE-2020-13870

The technical aspects of this CVE include:

Vulnerability Description

The issue lies in the Comments plugin before version 1.5.5 for Craft CMS, allowing for stored XSS attacks via an asset volume name.

Affected Systems and Versions

Product: Craft CMS
Vendor: Comments plugin
Versions affected: All versions before 1.5.5

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the asset volume name, which are then executed when accessed by users.

Mitigation and Prevention

To address CVE-2020-13870, consider the following steps:

Immediate Steps to Take

Update the Comments plugin to version 1.5.5 or later to mitigate the vulnerability.
Implement input validation to sanitize user inputs and prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and audit plugins and extensions for security vulnerabilities.
Educate users on safe browsing practices and the risks of interacting with untrusted content.

Patching and Updates

Stay informed about security updates and patches released by plugin developers.
Apply patches promptly to ensure the security of your Craft CMS installation.