Name: CVE-2026-16038: Missing Authorization
Creator: Rapid7
Published: 2026-08-07T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-16038, CWE-862, CVSS 9.1, EPSS 0.0024

The MStore API WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.

CVSS Details

CVSS 3.1 Base Score: 9.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Mstore Api Plugin	—	Update mstore-api plugin to version 4.21.0, or a newer patched version	Aug 17, 2026	Aug 3, 2026

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CVSS Details

Covered by Rapid7

Prioritize with Active Threat Intelligence