CVE-2021-22871 Explained : Impact and Mitigation

Revive Adserver before version 5.1.0 allows any user with a manager account to store potentially malicious content in the URL website property, resulting in a persistent cross-site scripting (XSS) vulnerability.

Understanding CVE-2021-22871

This CVE identifies a cross-site scripting vulnerability in Revive Adserver that could be exploited by attackers to inject malicious content.

What is CVE-2021-22871?

CVE-2021-22871 highlights a security issue in Revive Adserver versions prior to 5.1.0, enabling users with manager accounts to input harmful content in the URL website property.

The Impact of CVE-2021-22871

The vulnerability allows for unsanitized display of the injected content in the affiliate-preview.php tag generation screen, leading to potential XSS attacks.

Technical Details of CVE-2021-22871

This section delves into the specifics of the vulnerability.

Vulnerability Description

Revive Adserver before 5.1.0 permits users to insert malicious content in the URL website property, opening the door to XSS attacks.

Affected Systems and Versions

The issue impacts Revive Adserver versions earlier than 5.1.0, exposing them to exploitation.

Exploitation Mechanism

By leveraging the ability to input unfiltered content in the URL website property, threat actors can execute persistent XSS attacks.

Mitigation and Prevention

Protect your systems and data by implementing the following measures.

Immediate Steps to Take

Users should update Revive Adserver to version 5.1.0 or later to mitigate the vulnerability and prevent XSS attacks.

Long-Term Security Practices

Enforce strict input validation and output encoding practices to prevent XSS vulnerabilities in web applications.

Patching and Updates

Regularly apply security patches and updates to ensure the safety and integrity of your systems.