CVE-2021-24275 : What You Need to Know

The Popup by Supsystic WordPress plugin before version 1.10.5 is affected by a reflected Cross-Site Scripting (XSS) vulnerability that could allow attackers to execute malicious scripts on the victim's browser.

Understanding CVE-2021-24275

This CVE describes a security issue in the Popup by Supsystic WordPress plugin that could lead to a Cross-Site Scripting attack.

What is CVE-2021-24275?

The Popup by Supsystic WordPress plugin version less than 1.10.5 fails to properly sanitize user input, specifically the tab parameter on its options page. This oversight allows an attacker to inject and execute malicious scripts on the client-side.

The Impact of CVE-2021-24275

Exploitation of this vulnerability can result in unauthorized access, data theft, defacement of websites, and potential compromise of user information. It poses a significant risk to affected systems and user data.

Technical Details of CVE-2021-24275

This section provides technical insights into the vulnerability.

Vulnerability Description

The issue arises due to the lack of input sanitization for the tab parameter in the Popup by Supsystic WordPress plugin options page, leading to a reflected Cross-Site Scripting (XSS) vulnerability.

Affected Systems and Versions

The vulnerability affects versions of the Popup by Supsystic WordPress plugin prior to 1.10.5.

Exploitation Mechanism

By crafting a malicious URL with a specially-crafted tab parameter, an attacker can trick users into clicking the link, thereby executing the injected script on the victim's browser.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2021-24275.

Immediate Steps to Take

Update the Popup by Supsystic WordPress plugin to version 1.10.5 or higher to patch the vulnerability.
Avoid clicking on suspicious links or visiting untrusted websites to minimize the risk of exploitation.

Long-Term Security Practices

Regularly update all plugins, themes, and WordPress core to the latest versions to address security vulnerabilities.
Implement web application firewalls and security plugins to enhance protection against XSS attacks.

Patching and Updates

Stay informed about security updates and patches released by plugin vendors. Promptly apply patches to eliminate known vulnerabilities and enhance the security posture of your WordPress site.