CVE-2026-16039

Medium

Description

The MStore API WordPress plugin before 4.21.0 does not restrict its vendor-orders endpoint to the caller's own orders, allowing any authenticated user, including Subscribers, to read every WooCommerce order in the store together with each customer's personal information.

SeverityMedium

CVSS6.5

Exploit probability—

ProductMStore API

PublishedAug 7, 2026

First seenAug 7, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

MStore API4.21.0 or later

Affected products

Product	Affected versions	Fixed in
MStore API	v < 4.21.0	4.21.0

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