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CVE-2026-9858— Partial Shipment for Woocommerce <= 3.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Settings Modification via wxp_order_shipment, wxp_order_item_shipment, and wxp_order_set_shipped AJAX Actions

Quick assessment

Affected
wpexpertshub Partial Shipment for WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件“Woocommerce Partial Shipment”在 3.4 及更早版本中，通过 、 和 这些 AJAX 动作，存在授权缺失（Missing Authorization）漏洞。 具体原因在于： 文件中的 AJAX 处理函数（在第 60–62 行注册，分别在第 228、263 和 291 行实现）既缺少权限（capability）检查，也缺少 nonce 验证，且未对调用者是否拥有所提供的 的所有权进行校验。 这使得已登录的攻击者（具有 Subscriber 或更高权限）能够： 1.

CVSS 4.3 · Medium
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I. Basic Information for CVE-2026-9858

Vulnerability Information
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Vulnerability Title
Partial Shipment for Woocommerce <= 3.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Settings Modification via wxp_order_shipment, wxp_order_item_shipment, and wxp_order_set_shipped AJAX Actions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpexpertshub Partial Shipment for WooCommerce 0 ~ 3.4 -

II. Public POCs for CVE-2026-9858

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III. Intelligence Information for CVE-2026-9858

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Vendor Pages for CVE-2026-9858 (1)

Other References for CVE-2026-9858 (4)

IV. Related Vulnerabilities

Same weakness: CWE-862

V. Comments for CVE-2026-9858

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