CVE-2021-24883 : Security Advisory and Response

The Popup Anything WordPress plugin before version 2.0.4 is affected by a Stored Cross-Site Scripting (XSS) vulnerability that allows users with a role as low as Contributor to execute malicious scripts.

Understanding CVE-2021-24883

This CVE highlights a security issue in the Popup Anything plugin that could be exploited by attackers to inject and execute arbitrary scripts on compromised websites.

What is CVE-2021-24883?

The Popup Anything plugin, prior to version 2.0.4, fails to properly escape the Link Text and Button Text fields in Popup, enabling attackers with limited privileges to conduct XSS attacks.

The Impact of CVE-2021-24883

Exploitation of this vulnerability could result in unauthorized script execution, leading to various malicious activities such as data theft, defacement, or account takeover on affected WordPress sites.

Technical Details of CVE-2021-24883

This section covers key technical aspects of the CVE to help users understand the vulnerability better.

Vulnerability Description

The vulnerability in the Popup Anything plugin arises from the lack of sanitization of user inputs in the Link Text and Button Text fields, allowing attackers to inject and execute malicious scripts.

Affected Systems and Versions

Popup Anything versions earlier than 2.0.4 are susceptible to this vulnerability. Websites using affected versions are at risk of XSS attacks by unauthorized users.

Exploitation Mechanism

Attackers, even with low-level roles such as Contributor, can exploit this vulnerability by crafting specially-crafted input to the Popup fields, leading to the execution of arbitrary scripts on the target website.

Mitigation and Prevention

Protecting your WordPress site from CVE-2021-24883 is crucial to maintain its security and integrity.

Immediate Steps to Take

Website administrators should update the Popup Anything plugin to version 2.0.4 or higher to patch the vulnerability and prevent potential XSS attacks.

Long-Term Security Practices

Regularly monitor and update all installed plugins and themes on your WordPress site to address security vulnerabilities promptly and enhance overall website security.

Patching and Updates

Stay informed about security patches released by plugin developers and apply updates promptly to mitigate the risk of exploitation through known vulnerabilities.