CVE-2021-22875 : What You Need to Know

Revive Adserver before version 5.1.1 is susceptible to a reflected XSS vulnerability in stats.php via the

setPerPage

parameter.

Understanding CVE-2021-22875

This CVE details a security flaw in Revive Adserver that could be exploited by an attacker to execute a reflected cross-site scripting (XSS) attack.

What is CVE-2021-22875?

CVE-2021-22875 is a vulnerability found in Revive Adserver versions prior to 5.1.1, allowing malicious actors to inject and execute script code in the context of a user's web browser.

The Impact of CVE-2021-22875

This vulnerability could lead to various attacks, including the theft of sensitive information, session hijacking, defacement of web pages, and malware distribution.

Technical Details of CVE-2021-22875

The technical details of CVE-2021-22875 include:

Vulnerability Description

The vulnerability arises due to improper validation of user-supplied input in the

setPerPage

parameter in stats.php, which can be exploited by an attacker to execute malicious scripts.

Affected Systems and Versions

Revive Adserver versions before 5.1.1 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious URLs containing script payloads that are executed when the URL is visited by a user.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-22875, consider the following steps:

Immediate Steps to Take

Upgrade Revive Adserver to version 5.1.1 or later to fix the vulnerability.
Monitor web traffic for any unusual activity or injection attempts.

Long-Term Security Practices

Regularly update and patch software to prevent similar vulnerabilities.
Educate users about safe browsing practices to minimize the risk of XSS attacks.

Patching and Updates

Ensure that all systems and software are regularly updated with the latest security patches to protect against known vulnerabilities.