CVE-2021-41502 : Vulnerability Insights and Analysis

Subrion CMS v4.2.1 is affected by a stored cross-site scripting (XSS) vulnerability that allows the execution of malicious JavaScript code.

Understanding CVE-2021-41502

What is CVE-2021-41502?

This CVE identifies a security issue in Subrion CMS v4.2.1 that enables the execution of harmful JavaScript code through an XSS vulnerability.

The Impact of CVE-2021-41502

An attacker could exploit this vulnerability to execute arbitrary JavaScript code by manipulating the name of an uploaded image, closing HTML tags, or adding the onerror attribute, leading to potential data theft or manipulation.

Technical Details of CVE-2021-41502

Vulnerability Description

The vulnerability in Subrion CMS v4.2.1 allows for stored cross-site scripting (XSS) attacks, enabling the injection of malicious JavaScript code.

Affected Systems and Versions

Product: Subrion CMS
Version: 4.2.1

Exploitation Mechanism

The XSS vulnerability can be exploited by modifying the uploaded image's name, closing HTML tags prematurely, or including the onerror attribute.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches provided by Subrion CMS.
Regularly monitor and review user-uploaded content for malicious code.
Implement input validation mechanisms to prevent XSS attacks.
Consider using Content Security Policy (CSP) to mitigate XSS risks.

Long-Term Security Practices

Conduct regular security assessments and penetration testing of your CMS.
Educate users and administrators about secure coding practices and the risks of XSS vulnerabilities.

Patching and Updates

Ensure timely installation of security updates and patches released by Subrion CMS to remediate the XSS vulnerability.