CVE-2021-40921 Explained : Impact and Mitigation

This CVE-2021-40921 article provides details about a cross-site scripting vulnerability affecting Detector 0.8.5 and below versions.

Understanding CVE-2021-40921

This section will cover what CVE-2021-40921 entails in terms of impact, technical details, and mitigation strategies.

What is CVE-2021-40921?

CVE-2021-40921 is a cross-site scripting vulnerability found in _contactform.inc.php in Detector versions 0.8.5 and earlier, allowing malicious actors to inject arbitrary web scripts or HTML via the 'cid' parameter.

The Impact of CVE-2021-40921

The vulnerability could enable remote attackers to execute malicious scripts on a victim's web browser, potentially leading to data theft, unauthorized actions, or defacement.

Technical Details of CVE-2021-40921

This section delves into specific technical aspects of CVE-2021-40921.

Vulnerability Description

A cross-site scripting vulnerability in _contactform.inc.php in Detector 0.8.5 and below versions permits attackers to inject malicious web scripts through the 'cid' parameter.

Affected Systems and Versions

Affected Product: Not Applicable (n/a)
Affected Vendor: Not Applicable (n/a)
Affected Version: Not Applicable (n/a)

Exploitation Mechanism

The exploitation of this vulnerability involves injecting crafted code via the 'cid' parameter in _contactform.inc.php to execute scripts in a victim's browser.

Mitigation and Prevention

In this section, find suggestions to mitigate the risks associated with CVE-2021-40921.

Immediate Steps to Take

Update Detector to version 0.8.6 or a secure release that addresses the XSS vulnerability.
Implement input validation mechanisms to sanitize user inputs and prevent script injections.
Monitor network traffic for suspicious activities indicating XSS attempts.

Long-Term Security Practices

Conduct regular security audits and code reviews to identify and remediate potential vulnerabilities.
Educate developers on secure coding practices and the risks associated with XSS vulnerabilities.

Patching and Updates

Stay informed about security patches and updates released by Detector to address known vulnerabilities.