What is CVE-2026-16039?

CVE-2026-16039 is a medium-severity vulnerability in Mstore Api, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-08-07.

How severe is CVE-2026-16039?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Mstore Api

CVE-2026-16039

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…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Unknown Mstore Api — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

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

Frequently asked questions

What is CVE-2026-16039?: CVE-2026-16039 is a medium-severity vulnerability in Mstore Api, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-08-07.
How severe is CVE-2026-16039?: Medium severity. CVSS v3 base score is 6.5 out of 10.