Auth bypass in Mstore API
CVE-2026-18234
The MStore API WordPress plugin before 4.21.1 does not verify that the order targeted by its wallet payment handling belongs to the requester, and does not deduct the wallet balance for most payment methods, allowing any authenticated user, including Subscribers, to mark arbitrary orders as paid without any payment being taken.
Vulnerability class: Broken Access Control
EPSS: 0.001 (3.1th percentile) — read the EPSS interpretation.
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:N/I:H/A:N.
Affected products
- Unknown Mstore Api
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-18234?
- CVE-2026-18234 is a medium-severity vulnerability in Mstore API, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-08-29.
- How severe is CVE-2026-18234?
- Medium severity. CVSS v3 base score is 6.5 out of 10.