CVE-2026-57419: Stock Locations for WooCommerce Auth Bypass

CVE-2026-57419 Overview

CVE-2026-57419 is a Missing Authorization vulnerability [CWE-862] affecting the Stock Locations for WooCommerce WordPress plugin by Fahad Mahmood. The flaw exists in all plugin versions up to and including 3.1.8. Authenticated attackers holding low-privilege accounts can exploit incorrectly configured access control checks to perform actions reserved for higher-privileged users. The vulnerability impacts data integrity within WooCommerce stores that rely on the plugin for multi-location inventory management. No user interaction is required, and the attack is executed over the network.

Critical Impact
Authenticated attackers with low privileges can modify stock location data on WooCommerce sites running Stock Locations for WooCommerce <= 3.1.8, compromising inventory integrity.

Affected Products

Fahad Mahmood Stock Locations for WooCommerce plugin, all versions up to and including 3.1.8
WordPress sites running WooCommerce with the vulnerable stock-locations-for-woocommerce plugin installed
Any e-commerce environment dependent on the plugin for multi-warehouse inventory tracking

Discovery Timeline

2026-07-13 - CVE-2026-57419 published to the National Vulnerability Database (NVD)
2026-07-13 - Last updated in NVD database

Technical Details for CVE-2026-57419

Vulnerability Analysis

The vulnerability is a broken access control issue classified under [CWE-862] Missing Authorization. The plugin exposes functionality that fails to verify whether the requesting user holds the appropriate capability or role before executing privileged operations. An attacker with any authenticated session, including subscriber-level accounts, can invoke these endpoints and influence stock location data. The integrity impact is high, while confidentiality and availability remain unaffected according to the CVSS vector.

Root Cause

The root cause is the absence of proper capability checks such as current_user_can() on plugin actions, or missing nonce validation on state-changing requests. Without these server-side authorization gates, the plugin trusts any authenticated request to modify inventory or configuration data managed by the plugin.

Attack Vector

Exploitation requires network access to the target WordPress site and a valid low-privilege account. The attacker sends crafted HTTP requests to plugin-exposed endpoints, likely AJAX handlers or REST routes registered by stock-locations-for-woocommerce. Because no additional user interaction is required, exploitation can be scripted. Refer to the Patchstack Vulnerability Report for endpoint-level detail.

// No verified public proof-of-concept code is available.
// See the Patchstack advisory for technical specifics.

Detection Methods for CVE-2026-57419

Indicators of Compromise

Unexpected changes to stock location records, warehouse assignments, or inventory quantities within the WooCommerce database
HTTP POST requests to admin-ajax.php or plugin-specific REST endpoints originating from low-privilege user sessions
WordPress audit log entries showing subscriber or customer accounts performing inventory management actions

Detection Strategies

Review WordPress access logs for requests targeting stock-locations-for-woocommerce endpoints from non-administrator accounts
Correlate WooCommerce order and stock adjustment events with the acting user role to identify privilege mismatches
Deploy a Web Application Firewall (WAF) rule that inspects plugin AJAX calls and blocks requests lacking proper administrative context

Monitoring Recommendations

Enable WordPress activity logging plugins to capture user role, action, and endpoint metadata for every request
Monitor for anomalous authenticated traffic patterns from subscriber-tier accounts against WooCommerce administrative paths
Alert on changes to plugin configuration tables and inventory records outside expected maintenance windows

How to Mitigate CVE-2026-57419

Immediate Actions Required

Update Stock Locations for WooCommerce to a version newer than 3.1.8 once the vendor releases a patched build
Audit existing WordPress user accounts and remove or downgrade any unnecessary low-privilege accounts that could be leveraged for exploitation
Review inventory and stock location data for unauthorized modifications and restore from known-good backups if tampering is confirmed

Patch Information

At the time of NVD publication on 2026-07-13, the advisory lists affected versions as n/a through <= 3.1.8. Administrators should consult the Patchstack Vulnerability Report and the plugin's official changelog for the fixed release version.

Workarounds

Deactivate and remove the stock-locations-for-woocommerce plugin until a fixed version is available if inventory features are not business-critical
Restrict site registration to prevent creation of new low-privilege accounts that could exploit the flaw
Apply WAF rules that block unauthenticated or subscriber-level requests to plugin-specific AJAX and REST endpoints

bash

# Example WP-CLI command to deactivate the vulnerable plugin
wp plugin deactivate stock-locations-for-woocommerce
wp plugin uninstall stock-locations-for-woocommerce