What is CVE-2026-16038?

CVE-2026-16038 is a critical-severity vulnerability in Mstore Api, classified under Missing Authorization. CVSS score: 9.1/10. Published 2026-08-07.

How severe is CVE-2026-16038?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Mstore Api

CVE-2026-16038

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 o…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Unknown Mstore Api — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-16038?: CVE-2026-16038 is a critical-severity vulnerability in Mstore Api, classified under Missing Authorization. CVSS score: 9.1/10. Published 2026-08-07.
How severe is CVE-2026-16038?: Critical severity. CVSS v3 base score is 9.1 out of 10.