CVE-2021-22874 : Exploit Details and Defense Strategies

Revive Adserver before 5.1.1 is vulnerable to a reflected XSS vulnerability in userlog-index.php via the

period_preset

parameter.

Understanding CVE-2021-22874

This CVE identifies a reflected Cross-site Scripting (XSS) vulnerability in Revive Adserver version prior to 5.1.1.

What is CVE-2021-22874?

CVE-2021-22874 highlights a security issue in Revive Adserver where attackers can exploit a reflected XSS vulnerability through the

period_preset

parameter in userlog-index.php.

The Impact of CVE-2021-22874

The vulnerability in CVE-2021-22874 could allow malicious actors to execute arbitrary script code in a victim's browser, leading to potential data theft or unauthorized actions.

Technical Details of CVE-2021-22874

In-depth technical information regarding this CVE includes:

Vulnerability Description

The vulnerability arises from inadequate input sanitization in the

period_preset

parameter of userlog-index.php, enabling attackers to inject malicious scripts.

Affected Systems and Versions

Revive Adserver versions before 5.1.1 are impacted by this security issue.

Exploitation Mechanism

By crafting a specially designed link containing malicious code in the

period_preset

parameter, threat actors can launch a reflected XSS attack.

Mitigation and Prevention

To safeguard systems against CVE-2021-22874, consider the following measures:

Immediate Steps to Take

Immediately update Revive Adserver to version 5.1.1 or higher to eliminate the vulnerability.

Long-Term Security Practices

Implement strict input validation mechanisms and regularly audit web application code to prevent XSS vulnerabilities.

Patching and Updates

Regularly monitor security advisories and apply patches promptly to address any emerging security issues.