CVE-2021-23387 : Vulnerability Insights and Analysis

Open Redirect vulnerability in the 'trailing-slash' package before version 2.0.1 allows attackers to redirect users to malicious websites by exploiting double slashes in the URL.

Understanding CVE-2021-23387

This CVE describes an Open Redirect vulnerability in the 'trailing-slash' package that could lead to potential security risks.

What is CVE-2021-23387?

The vulnerability in trailing-slash before version 2.0.1 enables attackers to redirect users to attacker-controlled sites using crafted URLs with double trailing slashes.

The Impact of CVE-2021-23387

The vulnerability poses a medium severity risk with a CVSS base score of 5.4, allowing attackers to trick users into visiting malicious websites through URL manipulation.

Technical Details of CVE-2021-23387

This section provides technical insights into the vulnerability and its exploit mechanisms.

Vulnerability Description

The issue resides in index.js::createTrailing() of the 'trailing-slash' package, where the web server mishandles relative URLs, enabling attackers to perform Open Redirect attacks.

Affected Systems and Versions

The vulnerability affects versions of 'trailing-slash' prior to 2.0.1.

Exploitation Mechanism

Attackers exploit the vulnerability by injecting extra slashes in the URL, redirecting users to malicious websites.

Mitigation and Prevention

Learn how to secure your systems and prevent potential exploits.

Immediate Steps to Take

Upgrade 'trailing-slash' to version 2.0.1 or above to mitigate the Open Redirect vulnerability.

Long-Term Security Practices

Implement secure coding practices and conduct regular security audits to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security updates and promptly apply patches to eliminate known vulnerabilities.