Popup Builder Vulnerability – Authenticated(Contributor+) Stored Cross-Site Scripting via Custom JS – CVE-2024-2506 | WordPress Plugin Vulnerability Report

Plugin Name: Popup Builder – Create highly converting, mobile friendly marketing popups.

Key Information:

  • Software Type: Plugin
  • Software Slug: popup-builder
  • Software Status: Active
  • Software Author: popupbuilder
  • Software Downloads: 10,104,066
  • Active Installs: 200,000
  • Last Updated: June 12, 2024
  • Patched Versions: 4.3.0
  • Affected Versions: <= 4.2.7

Vulnerability Details:

  • Name: Popup Builder <= 4.2.7
  • Title: Authenticated(Contributor+) Stored Cross-Site Scripting via Custom JS
  • Type: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
  • CVE: CVE-2024-2506
  • CVSS Score: 6.4
  • Publicly Published: May 31, 2024
  • Researcher: Tim Coen
  • Description: The Popup Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the custom JS functionality in all versions up to, and including, 4.2.7 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
  • References: Wordfence Article

Summary:

The Popup Builder plugin for WordPress has a vulnerability in versions up to and including 4.2.7 that enables authenticated attackers with contributor-level access and above to execute stored cross-site scripting (XSS) attacks via the custom JavaScript functionality. This vulnerability has been patched in version 4.3.0.

Detailed Overview:

The vulnerability in Popup Builder versions up to 4.2.7 arises from insufficient input sanitization and output escaping on user-supplied attributes, allowing attackers to inject arbitrary web scripts. Authenticated attackers with contributor-level access or higher can exploit this vulnerability to insert malicious scripts into pages, which will execute whenever a user accesses the injected page. The risk of exploitation includes unauthorized script execution, potential data theft, and compromised website integrity. To remediate the vulnerability, users are strongly encouraged to update to version 4.3.0 or later.

Advice for Users:

  • Immediate Action: Update the Popup Builder plugin to version 4.3.0 or later immediately to patch the vulnerability.
  • Check for Signs of Vulnerability: Monitor your website for any unusual activities or unauthorized script executions, which may indicate exploitation of the vulnerability.
  • Alternate Plugins: While a patch is available, users may consider deactivating the Popup Builder plugin temporarily or exploring alternative plugins that offer similar functionality.
  • Stay Updated: Regularly check for updates for all installed plugins and themes to ensure the security of your WordPress installation.

Conclusion:

The prompt response from the Popup Builder developers to address this vulnerability underscores the importance of timely updates in maintaining the security of WordPress installations. Users are advised to ensure that they are running version 4.3.0 or later to secure their WordPress installations against potential exploits.

References:

Detailed Report: 

Protecting Your Digital Assets: Understanding Website Security Vulnerabilities

In today's digital landscape, website security is paramount. With countless online threats looming, staying vigilant and up to date with security patches is essential to safeguarding your digital assets. However, even with the most diligent efforts, vulnerabilities can still slip through the cracks. This is precisely what we'll be addressing in this article, focusing on a critical vulnerability discovered in the Popup Builder plugin for WordPress.

Popup Builder Vulnerability - Authenticated(Contributor+) Stored Cross-Site Scripting via Custom JS - CVE-2024-2506 | WordPress Plugin Vulnerability Report

The Popup Builder plugin, renowned for its ability to create highly converting, mobile-friendly marketing popups, has unfortunately fallen victim to a serious security flaw. Authenticated attackers with contributor-level access and above can exploit this vulnerability, marked as CVE-2024-2506, to execute stored cross-site scripting (XSS) attacks via the custom JavaScript functionality. This allows them to inject malicious scripts into pages, posing significant risks to website integrity and potentially facilitating unauthorized data access.

Comprehensive Overview: Understanding the Vulnerability

Our comprehensive overview will delve into the specifics of this vulnerability, detailing its origins, potential impacts, and, most importantly, how users can protect their websites. From immediate actions to ongoing vigilance, we'll provide practical advice tailored to WordPress site owners to mitigate risks effectively.

Proactive Measures: Safeguarding Your Website

As we navigate through this security concern, it's crucial to underscore the broader lesson: the importance of prompt updates and proactive security measures. The Popup Builder incident serves as a potent reminder of the ever-evolving threat landscape and the necessity of staying ahead of potential exploits. By prioritizing security and remaining vigilant, website owners can fortify their digital presence against emerging threats.

Conclusion: Emphasizing Security in Digital Operations

Stay tuned for our in-depth analysis and actionable insights to secure your WordPress site against vulnerabilities like CVE-2024-2506.

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