CVE-2021-25099 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2021-25099, a vulnerability found in the GiveWP WordPress plugin before version 2.17.3 that leads to unauthenticated Reflected Cross-Site Scripting (XSS).

Understanding CVE-2021-25099

CVE-2021-25099 is a security vulnerability identified in the GiveWP WordPress plugin, allowing attackers to execute malicious scripts in the context of an authenticated user's session through a specific AJAX action.

What is CVE-2021-25099?

The GiveWP WordPress plugin before version 2.17.3 fails to properly sanitize and escape the form_id parameter in unauthenticated requests via the give_checkout_login AJAX action. This oversight enables an attacker to inject and execute arbitrary JavaScript code within the user's browser, potentially leading to unauthorized actions.

The Impact of CVE-2021-25099

The unauthenticated Reflected Cross-Site Scripting vulnerability in GiveWP plugin versions prior to 2.17.3 poses a significant risk to site integrity and user data. Attackers can exploit this flaw to perform various malicious activities, such as stealing sensitive information or performing unauthorized actions on behalf of users.

Technical Details of CVE-2021-25099

This section delves into the specific technical aspects of CVE-2021-25099, including the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from the lack of proper sanitization and escaping of the form_id parameter, allowing attackers to craft malicious payloads that execute in the user's browser upon visiting a compromised page.

Affected Systems and Versions

The affected product is the GiveWP – Donation Plugin and Fundraising Platform with versions prior to 2.17.3. Users with these versions are at risk of exploitation from potential attackers leveraging this security flaw.

Exploitation Mechanism

By sending a crafted unauthenticated request through the give_checkout_login AJAX action, threat actors can inject malicious scripts into the response, which get executed in the context of a victim's session, enabling unauthorized actions.

Mitigation and Prevention

To safeguard your systems and mitigate the risks associated with CVE-2021-25099, it is crucial to take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Update the GiveWP plugin to version 2.17.3 or newer to patch the vulnerability. Additionally, monitor for any unusual activities on your website that could indicate exploitation.

Long-Term Security Practices

Implement regular security audits, educate your team on secure coding practices, and stay informed about potential security threats within the WordPress ecosystem.

Patching and Updates

Stay current with security updates and patches released by plugin developers. Timely installation of patches can help fortify your defenses against emerging vulnerabilities and cyber threats.