CVE-2026-9858
Received Received - Intake

Missing Authorization in Partial Shipment for WooCommerce

Publication date: 2026-09-19

Last updated on: 2026-09-20

Assigner: Wordfence

Description
The Partial Shipment for Woocommerce plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 3.4 via the wxp_order_shipment, wxp_order_item_shipment, and wxp_order_set_shipped AJAX actions. This is due to the AJAX handlers in woocommerce-partial-shipment.php (registered at lines 60–62 and implemented at lines 228, 263, and 291) lacking both capability checks and nonce verification, and not validating the calling user's ownership of the supplied order_id. This makes it possible for authenticated attackers, with Subscriber-level access and above, to read arbitrary order item details (names, quantities, shipped counts) belonging to any customer and to modify the shipment status / shipped quantities of any order, which can also trigger order status transitions via the wxp_order_status action.

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Meta Information

Published
2026-09-19
Last Modified
2026-09-20
Generated
2026-09-20
AI Q&A
2026-09-20
EPSS Evaluated
N/A
NVD
CVE-2026-9858

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
woocommerce_partial_shipment woocommerce_partial_shipment to 3.4 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This vulnerability affects the Partial Shipment for Woocommerce plugin in WordPress. It allows authenticated users with Subscriber-level access or higher to exploit missing authorization checks in AJAX actions. These actions can read or modify order details and shipment status without proper validation of user permissions or ownership of the order.

Detection Guidance

Check WordPress sites for the Partial Shipment for Woocommerce plugin versions up to 3.4. Look for unauthorized AJAX requests to wxp_order_shipment, wxp_order_item_shipment, or wxp_order_set_shipped endpoints. Review server logs for suspicious activity from Subscriber-level users or higher.

Impact Analysis

An attacker could access sensitive order information like customer names, quantities, and shipped counts. They could also alter shipment statuses or quantities, potentially causing unintended order status changes. This requires only low-privilege access to the WordPress site.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data in orders, violating GDPR's data protection principles. For HIPAA, exposure of customer order details might breach protected health information confidentiality if orders contain such data.

Mitigation Strategies

Update the Partial Shipment for Woocommerce plugin to the latest version. If an update is unavailable, disable the plugin immediately. Implement strict access controls to limit Subscriber-level users' permissions. Monitor order status changes and shipment modifications for unauthorized activity.

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