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Security Advisory

WordPress 4.0.26 Security Vulnerability: CVE-2025-3419 Guide

    📅 June 07, 2026
    ·⏱ 5 min read
    ·🔒 SiteRecipe Security Team
  

⚠ 153 websites still running wordpress 4.0.26 → View full list

Total

High

WordPress powers over 43% of the web, making it a prime target for attackers. If you're running WordPress 4.0.26 with the Eventin plugin, you're sitting on a security time bomb. CVE-2025-3419 exposes your website to unauthenticated arbitrary file reading attacks, potentially compromising sensitive data without any user interaction.

This vulnerability affects the popular Event Manager, Events Calendar, Tickets, and Registrations – Eventin plugin in all versions up to 4.0.26. The flaw exists in the proxy_image() function, allowing attackers to bypass security restrictions and access files they shouldn't be able to reach. With 153 websites currently running this vulnerable version, the risk is real and widespread.

In this comprehensive guide, we'll walk you through understanding this vulnerability, checking if you're affected, and implementing immediate fixes to protect your WordPress installation.

What is Wordpress 4.0.26?

WordPress 4.0.26 is a version of the Eventin plugin, a popular event management solution for WordPress websites. This plugin helps website owners create, manage, and sell tickets for events directly from their WordPress dashboard. It's designed to make event management simple by integrating calendar functionality, registration forms, and ticketing systems into your existing WordPress site.

The Eventin plugin is trusted by website owners worldwide because it combines event scheduling, attendee management, and payment processing in one easy-to-use package. Whether you're running a conference, workshop, concert, or community gathering, this plugin streamlines the entire event lifecycle. However, like all software, it can contain security vulnerabilities that require immediate attention.

Key Vulnerabilities in Wordpress 4.0.26

1 CVEs found. The most critical are explained below.

HIGH CVE-2025-3419 7.5/10 · CVSS v3.1 ⏱ Immediate

Eventin Plugin Allows Unauthorized File Access

The Eventin plugin (used for managing events and ticket registrations) has a security flaw that lets hackers read sensitive files from your server without needing to log in. This is like leaving your filing cabinet unlocked in a public hallway—anyone walking by can peek inside.

Impact: Attackers could steal confidential information like database credentials, customer data, business secrets, or configuration files that contain sensitive settings for your website and services.

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How to Check If Your Website Is Affected

1 Log into your WordPress admin dashboard and navigate to Plugins from the left menu
2 Look for 'The Event Manager, Events Calendar, Tickets, Registrations – Eventin' in your installed plugins list
3 Check the version number next to the plugin name; if it shows 4.0.26 or earlier, you're vulnerable to CVE-2025-3419

How to Fix These Vulnerabilities

1 Immediately back up your entire WordPress site using your hosting provider's backup tool or a plugin like UpdraftPlus
2 Navigate to Plugins > Installed Plugins in your WordPress admin dashboard
3 Click 'Update' next to the Eventin plugin to upgrade it to version 4.0.27 or later, which patches the vulnerability
4 After updating, verify the new version number displays correctly and test your event pages to ensure everything functions properly

Conclusion

CVE-2025-3419 represents a serious security risk that demands immediate action. This unauthenticated file read vulnerability could expose your database credentials, customer information, and sensitive business data. Delaying the patch puts your website and users at ongoing risk of compromise.

Don't let your WordPress security fall through the cracks. Use SiteRecipe.com's automated vulnerability scanner to continuously monitor all your plugins and themes for known vulnerabilities. Our platform checks your entire WordPress installation against the latest CVE database, alerting you instantly when updates become available. Protect your website today—visit SiteRecipe.com for free vulnerability scanning and peace of mind.

Frequently Asked Questions

Can attackers exploit CVE-2025-3419 without logging into my WordPress site?

Yes, this is why it's so dangerous. CVE-2025-3419 is an unauthenticated vulnerability, meaning attackers don't need a WordPress user account to exploit it. They can read arbitrary files directly through the proxy_image() function by crafting specific requests to your website.

What files could an attacker access through this vulnerability?

Attackers could potentially access configuration files containing database credentials, wp-config.php files with sensitive information, other plugin files, theme files, and potentially customer data. The scope depends on your server configuration and file permissions.

Is updating the plugin to 4.0.27 enough to fully protect my site?

Updating to 4.0.27 or later patches this specific vulnerability. However, it's recommended to also review your web server logs for any suspicious activity, change database passwords as a precaution, and implement additional security measures like Web Application Firewalls (WAF) for defense in depth.

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DISCLAIMER: This report is based on publicly available CVE data from the National Vulnerability Database (NVD) maintained by NIST. Detection of a technology version does not confirm active exploitation on any specific website. For informational purposes only. SiteRecipe is not responsible for actions taken based on this report. Always consult a qualified security professional.

Source: nvd.nist.gov · Published: June 07, 2026 · SiteRecipe.com