Overview
The vulnerability we are discussing today, CVE-2025-4387, has been discovered in the Abandoned Cart Pro for WooCommerce plugin. Effectively, it provides a backdoor to attackers wanting to compromise a site’s server and execute potentially harmful code. Anyone using versions up to, and including, 9.16.0 of this plugin is affected by this vulnerability.
Given the popularity of WooCommerce as an ecommerce platform, this vulnerability could potentially impact a significant number of online businesses. The severity of this issue is further heightened by the fact that even an attacker with only subscriber-level access can exploit this vulnerability, leading to potential system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-4387
Severity: High (CVSS score of 8.8)
Attack Vector: Authenticated Arbitrary File Upload
Privileges Required: Subscriber-level Access
User Interaction: Required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Abandoned Cart Pro for WooCommerce | <= 9.16.0 How the Exploit Works
The Abandoned Cart Pro for WooCommerce plugin contains an authenticated arbitrary file upload vulnerability due to missing file type validation in the wcap_add_to_cart_popup_upload_files function. This means that a user with subscriber-level access or above can upload arbitrary files on the server where the plugin is installed. Once uploaded, these files could potentially be executed either remotely or locally depending on the server configuration, thus leading to a system compromise or data leakage.
Conceptual Example Code
Here’s an example of how an attacker might exploit this vulnerability by sending a POST request to the server with a crafted JSON payload containing the malicious file:
POST /upload_file HTTP/1.1
Host: target.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="file"; filename="malicious.php"
Content-Type: application/x-php
[...malicious PHP code...]
------WebKitFormBoundary7MA4YWxkTrZu0gW--Please note this is a simplified example and actual attack vectors could vary based on the server configuration and security measures in place.