CVE-2025-31609: WPCargo Track & Trace Auth Bypass Flaw

CVE-2025-31609 Overview

CVE-2025-31609 is a missing authorization vulnerability in the WPCargo Track & Trace plugin for WordPress, developed by Arni Cinco. The flaw affects all plugin versions up to and including 8.0.2. It stems from incorrectly configured access control checks, enabling authenticated users with low privileges to access resources or perform actions restricted to higher-privileged roles. The Patchstack advisory classifies the issue as an insecure direct object reference (IDOR) affecting shipment tracking data. The vulnerability is categorized under [CWE-862: Missing Authorization].

Critical Impact
Authenticated attackers with low privileges can access shipment records belonging to other users, breaking tenant isolation within WordPress sites that use WPCargo for logistics tracking.

Affected Products

WPCargo Track & Trace plugin for WordPress
All versions from n/a through <= 8.0.2
WordPress sites exposing WPCargo endpoints to authenticated users

Discovery Timeline

2025-03-31 - CVE-2025-31609 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31609

Vulnerability Analysis

The WPCargo Track & Trace plugin exposes functionality for managing and viewing shipment records within WordPress. The affected endpoints accept object identifiers (such as shipment IDs) from request parameters and return the corresponding record without validating that the requesting user owns or is permitted to view it. This behavior matches the pattern of an insecure direct object reference. Because the plugin skips the authorization check, any authenticated user can enumerate identifiers and retrieve data belonging to other accounts.

Root Cause

The root cause is missing authorization logic on plugin request handlers that serve shipment data. The code verifies that a session is authenticated but does not confirm that the session's user has the required capability or ownership relationship with the requested object. This gap corresponds directly to [CWE-862], where access control checks are absent from a code path that performs a sensitive action.

Attack Vector

Exploitation requires network access to the WordPress site and a valid low-privilege account, such as a subscriber or customer. The attacker iterates over object identifiers on the vulnerable endpoint and reads shipment records belonging to other users. No user interaction is required, and the attack complexity is low. The impact is limited to confidentiality; integrity and availability of the affected records are not directly compromised by this specific flaw. See the Patchstack WPCargo Plugin Vulnerability advisory for technical detail.

Detection Methods for CVE-2025-31609

Indicators of Compromise

Repeated authenticated requests to WPCargo tracking endpoints with sequentially incrementing shipment or record identifiers.
Access patterns where a single low-privilege account retrieves shipment records associated with many distinct users or email addresses.
Unexpected HTTP 200 responses returning shipment data to accounts that have never created a shipment.

Detection Strategies

Review WordPress and web server access logs for enumeration behavior against WPCargo query strings or REST routes.
Compare the requesting user ID against the owner of the returned shipment record in application-level audit logs.
Alert on any subscriber-role account that generates a high volume of requests to plugin endpoints handling shipment data.

Monitoring Recommendations

Enable verbose logging on the WPCargo plugin and forward logs to a central analytics pipeline for correlation.
Track the ratio of unique shipment IDs accessed per authenticated user and flag statistical outliers.
Monitor for spikes in 4xx responses on WPCargo endpoints, which can indicate active identifier enumeration.

How to Mitigate CVE-2025-31609

Immediate Actions Required

Update the WPCargo Track & Trace plugin to a fixed version released after 8.0.2 as published by the vendor.
Audit existing WordPress accounts and remove or downgrade low-privilege accounts that are no longer required.
Review recent WPCargo access logs for signs of prior enumeration against shipment identifiers.

Patch Information

Refer to the Patchstack WPCargo Plugin Vulnerability advisory for the fixed release information. Apply the update through the WordPress plugin manager or by replacing the plugin files directly on the server.

Workarounds

Restrict WPCargo endpoints at the web application firewall (WAF) to trusted IP ranges until the patch is applied.
Disable the WPCargo Track & Trace plugin on sites where shipment tracking is not actively used.
Enforce strong registration controls, such as manual approval, to limit the pool of authenticated accounts that could exploit the flaw.

bash

# Configuration example: use WP-CLI to update the plugin once a fixed version is available
wp plugin update wpcargo --path=/var/www/html
wp plugin list --name=wpcargo --fields=name,status,version