CVE-2021-43724 : Exploit Details and Defense Strategies

This CVE-2021-43724 affects Subrion CMS versions up to 4.2.1, exposing a Cross Site Scripting vulnerability in the Create Page functionality of the admin Account through an SGV file.

Understanding CVE-2021-43724

A detailed insight into the impact and technical details of CVE-2021-43724.

What is CVE-2021-43724?

CVE-2021-43724 is a Cross Site Scripting (XSS) vulnerability present in Subrion CMS up to version 4.2.1, specifically in the Create Page function within the admin Account using an SGV file.

The Impact of CVE-2021-43724

The vulnerability can allow malicious actors to execute arbitrary scripts within a victim's web browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2021-43724

Exploring the vulnerability and its technical specifics.

Vulnerability Description

The vulnerability resides in the inadequate filtering of user-supplied data within the Create Page feature, enabling attackers to inject malicious scripts.

Affected Systems and Versions

Product: Subrion CMS
Versions affected: Up to 4.2.1

Exploitation Mechanism

Attackers exploit the vulnerability by crafting a malicious SGV file that, when processed by the Create Page functionality, triggers the execution of unauthorized scripts.

Mitigation and Prevention

Recommendations to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

Disable the affected functionality if not essential for operations
Implement input validation and output encoding to prevent XSS attacks

Long-Term Security Practices

Regularly update Subrion CMS to the latest secure version
Conduct security assessments and audits to identify and address vulnerabilities
Educate users on recognizing and avoiding suspicious files and links

Patching and Updates

Ensure prompt installation of security patches and updates released by Subrion CMS to address CVE-2021-43724.