CVE-2021-22888 : Security Advisory and Response

Revive Adserver before v5.2.0 is vulnerable to a reflected XSS vulnerability in the

status

parameter of campaign-zone-zones.php, allowing attackers to execute injected JavaScript code by tricking users into clicking on a malicious URL.

Understanding CVE-2021-22888

This CVE identifies a reflected XSS vulnerability in Revive Adserver versions prior to v5.2.0, posing a risk to users through crafted URLs.

What is CVE-2021-22888?

CVE-2021-22888 highlights a security flaw in Revive Adserver that enables attackers to insert malicious JavaScript code by exploiting the

status

parameter in campaign-zone-zones.php.

The Impact of CVE-2021-22888

The vulnerability could lead to unauthorized execution of scripts within the context of the user interface, potentially compromising user data and system integrity.

Technical Details of CVE-2021-22888

This section provides insights into the vulnerability's description, affected systems, versions, and how the exploitation can occur.

Vulnerability Description

The flaw arises from insufficient input validation in the

status

parameter of campaign-zone-zones.php, enabling malicious script injection via specially crafted URLs.

Affected Systems and Versions

Revive Adserver versions preceding v5.2.0 are susceptible to this XSS vulnerability, impacting instances using the vulnerable 'status' parameter.

Exploitation Mechanism

Attackers utilize crafted URLs to embed malicious JavaScript code, tricking users authorized to access the Revive Adserver interface to unknowingly trigger the execution of the injected code.

Mitigation and Prevention

Explore immediate steps and long-term security practices to address and prevent potential security breaches.

Immediate Steps to Take

Users should update Revive Adserver to version 5.2.0 or later to mitigate the vulnerability and prevent exploitation through the 'status' parameter.

Long-Term Security Practices

Adopt stringent input validation practices, conduct security audits regularly, and educate users to recognize and avoid malicious URLs to enhance overall system security.

Patching and Updates

Stay informed about security patches and updates provided by Revive Adserver to address vulnerabilities promptly and maintain a secure environment.