Helloprint WordPress Plugin Vulnerability: Unauthenticated Order Status Modification (CVE-2025-13666)

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Overview

This blog post details a critical security vulnerability, identified as CVE-2025-13666, affecting the Helloprint plugin for WordPress. This vulnerability allows unauthenticated attackers to modify WooCommerce order statuses, potentially leading to significant business disruption and financial loss.

Technical Details

CVE-2025-13666 is a Missing Authorization vulnerability present in versions of the Helloprint plugin up to and including 2.1.2. The issue stems from the plugin’s improper implementation of authorization checks on a public REST API endpoint. Specifically, the /wp-json/helloprint/v1/complete_order_from_helloprint_callback endpoint lacks adequate authentication, allowing anyone to trigger its functionality.

An attacker can exploit this vulnerability by sending a crafted request to the vulnerable endpoint, including a valid WooCommerce order reference ID. Without proper authorization in place, the plugin processes the request and modifies the order status accordingly, potentially marking an order as complete even if it hasn’t been fulfilled. This allows malicious users to manipulate the order system and potentially defraud businesses.

The vulnerable code is located within the OrderController.php file, specifically around line 48.

CVSS Analysis

The vulnerability has been assigned a CVSS score of 5.3, indicating a MEDIUM severity. This score reflects the following characteristics:

  • Attack Vector (AV): Network (N) – The vulnerability can be exploited over the network.
  • Attack Complexity (AC): Low (L) – Exploitation is relatively straightforward.
  • Privileges Required (PR): None (N) – No privileges are required to exploit the vulnerability.
  • User Interaction (UI): None (N) – No user interaction is required to exploit the vulnerability.
  • Scope (S): Unchanged (U) – An exploited vulnerability can only affect resources managed by the same security authority.
  • Confidentiality Impact (C): None (N) – There is no impact to confidentiality.
  • Integrity Impact (I): Low (L) – There is some modification of data.
  • Availability Impact (A): None (N) – There is no impact to availability.

Possible Impact

Successful exploitation of CVE-2025-13666 can have several negative consequences:

  • Order Manipulation: Attackers can arbitrarily change the status of WooCommerce orders, potentially marking them as complete without proper fulfillment.
  • Financial Loss: Businesses may be forced to ship products without receiving payment due to manipulated order statuses.
  • Reputational Damage: Customers may experience confusion and frustration due to inaccurate order information.
  • Supply Chain Disruption: Manipulation of order statuses can disrupt the supply chain and lead to operational inefficiencies.

Mitigation and Patch Steps

The recommended mitigation is to immediately update the Helloprint plugin to the latest available version. Check the WordPress plugin repository or the Helloprint website for updates. If an update isn’t yet available, consider temporarily disabling the plugin until a patch is released.

Here are the general steps to update a WordPress plugin:

  1. Log in to your WordPress dashboard.
  2. Navigate to “Plugins” -> “Installed Plugins”.
  3. Locate the Helloprint plugin.
  4. If an update is available, click the “Update Now” link.

References

Vulnerable Code (Tag 2.1.2)
Vulnerable Code (Trunk)
Wordfence Threat Intelligence Report

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