CVE-2021-38710 : What You Need to Know

A Static (Persistent) XSS Vulnerability has been identified in version 4.3.0 of Yclas, specifically when utilizing the install/view/form.php script. This vulnerability allows an attacker to inject and store XSS in the database using the susceptible SITE_NAME parameter.

Understanding CVE-2021-38710

This section delves into the details of CVE-2021-38710, shedding light on its impact, technical aspects, and measures to mitigate the associated risks.

What is CVE-2021-38710?

The Static (Persistent) XSS Vulnerability in Yclas version 4.3.0 enables malicious actors to insert and save XSS payloads in the database by exploiting the vulnerable SITE_NAME parameter.

The Impact of CVE-2021-38710

The exploitation of this vulnerability could lead to unauthorized access to sensitive data, execution of malicious scripts, and potential compromise of the affected system's integrity.

Technical Details of CVE-2021-38710

Let's explore the technical specifics of CVE-2021-38710, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to improper input validation in the SITE_NAME parameter, allowing attackers to inject malicious XSS payloads that get stored in the database.

Affected Systems and Versions

Yclas version 4.3.0 is confirmed to be affected by this XSS vulnerability when utilizing the install/view/form.php script.

Exploitation Mechanism

By manipulating the SITE_NAME parameter, threat actors can input crafted XSS payloads, leading to potential script execution and data exposure.

Mitigation and Prevention

This section outlines the essential steps to address CVE-2021-38710, ensuring the security of systems and data.

Immediate Steps to Take

Disable or restrict access to the vulnerable script (install/view/form.php).
Implement input validation mechanisms to sanitize user-supplied data and prevent XSS attacks.

Long-Term Security Practices

Regularly update Yclas to the latest secure version to mitigate known vulnerabilities.
Conduct security audits to identify and remediate potential security gaps within the application.

Patching and Updates

Stay informed about security advisories and patches released by Yclas developers. Promptly apply security patches to address vulnerabilities and enhance system security.