CVE-2021-40925 : What You Need to Know

This article provides detailed information about the CVE-2021-40925 vulnerability, including its description, impact, technical details, and mitigation steps.

Understanding CVE-2021-40925

CVE-2021-40925 is a Cross-site scripting (XSS) vulnerability found in dompdf/dompdf/www/demo.php in faveo-helpdesk v1.11.0 and earlier versions. Attackers can exploit this vulnerability to inject malicious web scripts or HTML using the $_SERVER["PHP_SELF"] parameter.

What is CVE-2021-40925?

CVE-2021-40925 is a security flaw in faveo-helpdesk software that allows remote attackers to execute XSS attacks via a specific parameter.

The Impact of CVE-2021-40925

This vulnerability can lead to the injection of arbitrary web scripts or HTML by malicious actors, compromising the security of the application and potentially causing harm to users' data.

Technical Details of CVE-2021-40925

CVE-2021-40925 poses the following technical details:

Vulnerability Description

Type: Cross-site scripting (XSS)
Location: dompdf/dompdf/www/demo.php
Affected Version: faveo-helpdesk v1.11.0 and below

Affected Systems and Versions

Product: n/a
Vendor: n/a
Affected Version: n/a

Exploitation Mechanism

The vulnerability can be exploited by remote attackers to inject arbitrary web scripts or HTML using the vulnerable parameter $_SERVER["PHP_SELF"].

Mitigation and Prevention

To address CVE-2021-40925, consider the following mitigation and prevention steps:

Immediate Steps to Take

Update the faveo-helpdesk software to the latest version to patch the vulnerability.
Implement input validation to sanitize user inputs and prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and audit your web applications for security vulnerabilities.
Educate developers and users on secure coding practices to prevent XSS and other attacks.

Patching and Updates

Stay informed about security updates and patches released by the faveo-helpdesk software vendor.
Apply patches promptly to ensure that your system is protected against known vulnerabilities.