Essential Blocks Vulnerability – Authenticated (Contributor+) Stored Cross-Site Scripting – CVE-2024-4891 | WordPress Plugin Vulnerability Report

Q: What is the Essential Blocks plugin vulnerability, and how does it affect my WordPress website?

What is the Essential Blocks plugin vulnerability, and how does it affect my WordPress website? The Essential Blocks plugin vulnerability, identified as CVE-2024-4891, is a Stored Cross-Site Scripting (XSS) issue that affects versions up to and including 4.5.12. This vulnerability allows authenticated attackers with contributor-level permissions and above to inject malicious scripts into your website's pages, which execute whenever a user accesses an injected page. The vulnerability can potentially lead to sensitive information disclosure, session hijacking, and other malicious activities, compromising the security of your website and its users.

Q: How can I check if my Essential Blocks plugin is vulnerable?

How can I check if my Essential Blocks plugin is vulnerable? To determine if your Essential Blocks plugin is vulnerable, check your installed version. If you are using a version up to and including 4.5.12, your plugin is vulnerable to the Stored XSS issue. You can find your plugin version by navigating to the "Plugins" section in your WordPress dashboard and locating the Essential Blocks plugin in the list.

Q: How do I update the Essential Blocks plugin to the patched version?

How do I update the Essential Blocks plugin to the patched version? To update the Essential Blocks plugin to the patched version (4.5.13 or later), follow these steps: Log in to your WordPress dashboard. Navigate to the "Plugins" section. Locate the Essential Blocks plugin and click on the "Update Now" button. After updating, ensure that your plugin version is 4.5.13 or later to confirm a successful update.

Q: What should I do if I suspect my website has been compromised due to this vulnerability?

What should I do if I suspect my website has been compromised due to this vulnerability? If you suspect your website has been compromised due to the Essential Blocks vulnerability, take the following actions: Immediately update your Essential Blocks plugin to the patched version (4.5.13 or later). Review your website content, especially pages created or edited by contributor-level users or above, for any suspicious scripts or unintended behavior. Consider hiring a web security expert to perform a thorough security audit of your website to identify and resolve any potential issues.

Q: Are there any alternative plugins I can use instead of Essential Blocks?

Are there any alternative plugins I can use instead of Essential Blocks? Yes, there are several alternative WordPress plugins that offer similar functionality to Essential Blocks. Some popular options include: Gutenberg Blocks by Otter Atomic Blocks Getwid Gutenberg Blocks Stackable - Gutenberg Blocks Before installing any new plugin, ensure that it is regularly updated, has good reviews, and is compatible with your WordPress version.

Q: How often should I update my WordPress plugins to maintain website security?

How often should I update my WordPress plugins to maintain website security? It is generally recommended to update your WordPress plugins as soon as updates become available. Plugin developers often release updates to address security vulnerabilities, fix bugs, and introduce new features. To stay on top of plugin updates, regularly log in to your WordPress dashboard and check for available updates in the "Plugins" section. You can also enable automatic updates for your plugins to ensure they are always up to date.

Q: What other security measures can I implement to protect my WordPress website?

What other security measures can I implement to protect my WordPress website? In addition to regularly updating your plugins, there are several other security measures you can implement to protect your WordPress website: Use strong, unique passwords for all user accounts and enable two-factor authentication. Install an SSL certificate to encrypt data transmitted between your website and users' browsers. Regularly back up your website files and database to ensure you can quickly restore your site in case of a security breach or other issues. Use a reputable security plugin, such as Wordfence or Sucuri, to monitor your website for potential threats and vulnerabilities.

Q: How can I stay informed about future vulnerabilities in WordPress plugins?

How can I stay informed about future vulnerabilities in WordPress plugins? To stay informed about future vulnerabilities in WordPress plugins, follow these tips: Regularly check the official WordPress plugin directory and the changelog of your installed plugins for any security-related updates or announcements. Subscribe to WordPress security blogs and newsletters, such as WPScan, Wordfence, and Sucuri, to receive timely updates on newly discovered vulnerabilities. Join WordPress communities and forums, such as the official WordPress support forum or WordPress-specific groups on social media platforms, to stay connected with other users and developers who may share information about plugin vulnerabilities.

Q: Can I continue using the Essential Blocks plugin after updating to the patched version?

Can I continue using the Essential Blocks plugin after updating to the patched version? Yes, you can continue using the Essential Blocks plugin after updating to the patched version (4.5.13 or later). The patched version addresses the Stored XSS vulnerability, making it safe to use on your WordPress website. However, it's essential to remain vigilant and regularly check for updates to the plugin, as new vulnerabilities may be discovered in the future. Always ensure that you are using the latest patched version of the plugin to maintain the security of your website.

Q: What should I do if I'm unsure about handling the Essential Blocks vulnerability or have limited technical knowledge?

What should I do if I'm unsure about handling the Essential Blocks vulnerability or have limited technical knowledge? If you are unsure about handling the Essential Blocks vulnerability or have limited technical knowledge, consider the following options: Reach out to a web security expert or a professional WordPress developer who can assist you in updating your plugin, scanning your website for potential compromises, and implementing necessary security measures. Contact your website hosting provider's support team for guidance on updating your plugins and maintaining website security. Many hosting providers offer managed WordPress hosting plans that include automatic plugin updates and security monitoring. Remember, it's crucial to prioritize website security to protect your business and customers' data. Don't hesitate to seek help if you are unsure about handling security vulnerabilities on your own.

By Your WP Guy | May 16, 2024

Plugin Name: Essential Blocks

Key Information:

Software Type: Plugin
Software Slug: essential-blocks
Software Status: Active
Software Author: wpdevteam
Software Downloads: 3,418,922
Active Installs: 100,000
Last Updated: May 16, 2024
Patched Versions: 4.5.13
Affected Versions: <= 4.5.12

Vulnerability Details:

Name: Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.12 - Authenticated (Contributor+) Stored Cross-Site Scripting
Type: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2024-4891
CVSS Score: 6.4 (Medium)
Publicly Published: May 16, 2024
Researcher: João Pedro Soares de Alcântara
Description: The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tagName' parameter in versions up to, and including, 4.5.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Summary:

The Essential Blocks plugin for WordPress has a vulnerability in versions up to and including 4.5.12 that allows authenticated attackers with contributor-level permissions and above to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability has been patched in version 4.5.13.

Detailed Overview:

João Pedro Soares de Alcântara discovered a Stored Cross-Site Scripting vulnerability in the Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress. The vulnerability is caused by insufficient input sanitization and output escaping of the 'tagName' parameter in versions up to, and including, 4.5.12. This vulnerability allows authenticated attackers with contributor-level permissions and above to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, potentially leading to sensitive information disclosure, session hijacking, and other malicious activities.

Advice for Users:

Immediate Action: Users are strongly encouraged to update the Essential Blocks plugin to version 4.5.13 or later to mitigate the risk of this vulnerability.
Check for Signs of Vulnerability: Users should review their website content, especially pages created or edited by contributor-level users or above, for any suspicious scripts or unintended behavior.
Alternate Plugins: While a patch is available, users might still consider plugins that offer similar functionality as a precaution.
Stay Updated: Always ensure that your plugins are updated to the latest versions to avoid vulnerabilities.

The prompt response from the Essential Blocks developers to patch this vulnerability underscores the importance of timely updates. Users are advised to ensure that they are running version 4.5.13 or later to secure their WordPress installations.

References:

https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/essential-blocks

https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/essential-blocks/essential-blocks-page-builder-gutenberg-blocks-patterns-templates-4512-authenticated-contributor-stored-cross-site-scripting

Detailed Report:

In the ever-evolving world of web security, staying vigilant and keeping your website up to date is crucial. As a WordPress user, you rely on various plugins to enhance your site's functionality and user experience. However, a recent vulnerability discovered in the popular Essential Blocks plugin serves as a stark reminder of the importance of regular updates and maintaining a secure website.

About the Essential Blocks Plugin

The Essential Blocks plugin is a powerful tool for creating stunning pages using Gutenberg blocks, patterns, and templates. It has been downloaded over 3,418,922 times and has an active install base of 100,000 websites. The plugin is developed by wpdevteam and was last updated on May 16, 2024.

The Vulnerability (CVE-2024-4891)

A severe vulnerability was discovered in the Essential Blocks plugin, affecting versions up to and including 4.5.12. The vulnerability, identified as CVE-2024-4891, is classified as a Stored Cross-Site Scripting (XSS) issue caused by insufficient input sanitization and output escaping of the 'tagName' parameter. This vulnerability allows authenticated attackers with contributor-level permissions and above to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Risks and Potential Impacts

Neglecting to update your plugins, especially when vulnerabilities are disclosed, leaves your site exposed to potential attacks. Hackers can exploit these vulnerabilities to gain unauthorized access, steal sensitive data, or even deface your site. The Essential Blocks vulnerability could lead to sensitive information disclosure, session hijacking, and other malicious activities, potentially harming your website and its users.

Remediation Steps

To mitigate the risk of this vulnerability, follow these steps:

Immediate Action: Update the Essential Blocks plugin to version 4.5.13 or later.
Check for Signs of Vulnerability: Review your website content, especially pages created or edited by contributor-level users or above, for any suspicious scripts or unintended behavior.
Consider Alternate Plugins: While a patch is available, consider using alternative plugins that offer similar functionality as a precaution.
Stay Updated: Always ensure that your plugins are updated to the latest versions to avoid vulnerabilities.

Previous Vulnerabilities

It's worth noting that the Essential Blocks plugin has had a history of vulnerabilities. Since January 2023, there have been 17 previously reported vulnerabilities in the plugin. This highlights the importance of regularly monitoring and updating your plugins to ensure the security of your website.

The Importance of Staying Vigilant

As a small business owner with a WordPress website, it's crucial to prioritize website security, even if you have limited time and resources. Regularly updating your plugins, themes, and WordPress core is essential to protect your site from potential vulnerabilities. Implementing strong security measures, such as two-factor authentication, SSL certificates, and regular backups, can further enhance your website's security posture.

If you're unsure about the security status of your website or need assistance with updating your plugins, don't hesitate to seek help from web security experts. They can assess your website's vulnerability, implement necessary security measures, and provide guidance on maintaining a secure online presence.

Remember, investing in website security is not just about protecting your business; it's also about safeguarding your customers' trust and data. By staying informed about the latest vulnerabilities and taking proactive steps to address them, you can ensure the long-term success and reliability of your WordPress website.

As a business owner, you don't have time to constantly monitor for WordPress vulnerabilities like this. At Your WP Guy, we become your outsourced IT team to handle security, updates, maintenance and support. Let us fully audit your site and plugins to assess any impact from this issue. We'll update everything to patched versions so you can rest easy knowing your site is locked down.

Focus on your business goals while we focus on your WordPress site's security. Chat with us anytime during business hours, schedule a call or call 678-995-5169 for a free consultation on securing your online presence.

Essential Blocks Vulnerability – Authenticated (Contributor+) Stored Cross-Site Scripting – CVE-2024-4891 | WordPress Plugin Vulnerability Report FAQs

What is the Essential Blocks plugin vulnerability, and how does it affect my WordPress website?

The Essential Blocks plugin vulnerability, identified as CVE-2024-4891, is a Stored Cross-Site Scripting (XSS) issue that affects versions up to and including 4.5.12. This vulnerability allows authenticated attackers with contributor-level permissions and above to inject malicious scripts into your website's pages, which execute whenever a user accesses an injected page.

The vulnerability can potentially lead to sensitive information disclosure, session hijacking, and other malicious activities, compromising the security of your website and its users.

How can I check if my Essential Blocks plugin is vulnerable?

To determine if your Essential Blocks plugin is vulnerable, check your installed version. If you are using a version up to and including 4.5.12, your plugin is vulnerable to the Stored XSS issue.

You can find your plugin version by navigating to the "Plugins" section in your WordPress dashboard and locating the Essential Blocks plugin in the list.

How do I update the Essential Blocks plugin to the patched version?

To update the Essential Blocks plugin to the patched version (4.5.13 or later), follow these steps:

Log in to your WordPress dashboard.
Navigate to the "Plugins" section.
Locate the Essential Blocks plugin and click on the "Update Now" button.

After updating, ensure that your plugin version is 4.5.13 or later to confirm a successful update.

What should I do if I suspect my website has been compromised due to this vulnerability?

If you suspect your website has been compromised due to the Essential Blocks vulnerability, take the following actions:

Immediately update your Essential Blocks plugin to the patched version (4.5.13 or later).
Review your website content, especially pages created or edited by contributor-level users or above, for any suspicious scripts or unintended behavior.
Consider hiring a web security expert to perform a thorough security audit of your website to identify and resolve any potential issues.

Are there any alternative plugins I can use instead of Essential Blocks?

Yes, there are several alternative WordPress plugins that offer similar functionality to Essential Blocks. Some popular options include:

Gutenberg Blocks by Otter
Atomic Blocks
Getwid Gutenberg Blocks
Stackable - Gutenberg Blocks

Before installing any new plugin, ensure that it is regularly updated, has good reviews, and is compatible with your WordPress version.

How often should I update my WordPress plugins to maintain website security?

It is generally recommended to update your WordPress plugins as soon as updates become available. Plugin developers often release updates to address security vulnerabilities, fix bugs, and introduce new features.

To stay on top of plugin updates, regularly log in to your WordPress dashboard and check for available updates in the "Plugins" section. You can also enable automatic updates for your plugins to ensure they are always up to date.

What other security measures can I implement to protect my WordPress website?

In addition to regularly updating your plugins, there are several other security measures you can implement to protect your WordPress website:

Use strong, unique passwords for all user accounts and enable two-factor authentication.
Install an SSL certificate to encrypt data transmitted between your website and users' browsers.
Regularly back up your website files and database to ensure you can quickly restore your site in case of a security breach or other issues.
Use a reputable security plugin, such as Wordfence or Sucuri, to monitor your website for potential threats and vulnerabilities.

How can I stay informed about future vulnerabilities in WordPress plugins?

To stay informed about future vulnerabilities in WordPress plugins, follow these tips:

Regularly check the official WordPress plugin directory and the changelog of your installed plugins for any security-related updates or announcements.
Subscribe to WordPress security blogs and newsletters, such as WPScan, Wordfence, and Sucuri, to receive timely updates on newly discovered vulnerabilities.
Join WordPress communities and forums, such as the official WordPress support forum or WordPress-specific groups on social media platforms, to stay connected with other users and developers who may share information about plugin vulnerabilities.

Can I continue using the Essential Blocks plugin after updating to the patched version?

Yes, you can continue using the Essential Blocks plugin after updating to the patched version (4.5.13 or later). The patched version addresses the Stored XSS vulnerability, making it safe to use on your WordPress website.

However, it's essential to remain vigilant and regularly check for updates to the plugin, as new vulnerabilities may be discovered in the future. Always ensure that you are using the latest patched version of the plugin to maintain the security of your website.

What should I do if I'm unsure about handling the Essential Blocks vulnerability or have limited technical knowledge?

If you are unsure about handling the Essential Blocks vulnerability or have limited technical knowledge, consider the following options:

Reach out to a web security expert or a professional WordPress developer who can assist you in updating your plugin, scanning your website for potential compromises, and implementing necessary security measures.
Contact your website hosting provider's support team for guidance on updating your plugins and maintaining website security. Many hosting providers offer managed WordPress hosting plans that include automatic plugin updates and security monitoring.

Remember, it's crucial to prioritize website security to protect your business and customers' data. Don't hesitate to seek help if you are unsure about handling security vulnerabilities on your own.

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Posted in Security, Vulnerabilities and tagged Cross-Site Scripting, CVE-2024-4891, Essential Blocks, Plugin Updates, Small Business Website Security, stored XSS, Website Maintenance, Website Security, WordPress plugin vulnerability, wordpress security