CVE-2026-9858 Missing authorization in Partial Shipment for WooCommerce
Authenticated subscribers can read and modify arbitrary order shipment details due to missing authorization checks in AJAX handlers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9858?
CVE-2026-9858 is a medium-severity missing authorization vulnerability in wpexpertshub Partial Shipment for WooCommerce, published on 19 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-9858?
How do I fix CVE-2026-9858?
No fix has been published for CVE-2026-9858 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-9858 being exploited?
There is no known exploitation of CVE-2026-9858 in the wild and no public exploit code.
Sources
Also known as GHSA-57j3-8vm6-c5m2.