Auth bypass in Mstore API
CVE-2026-16041
The MStore API WordPress plugin before 4.21.0 does not perform authorization or purchase-ownership checks on its REST product-review creation route, allowing an unauthenticated attacker to create WooCommerce product reviews with an attacker-chosen reviewer name, email and star rating on stores configured to accept reviews only from verified owners.
Vulnerability class: Broken Access Control
EPSS: 0.002 (11.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Unknown Mstore Api — versions 0
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-16041?
- CVE-2026-16041 is a high-severity vulnerability in Mstore API, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-08-07.
- How severe is CVE-2026-16041?
- High severity. CVSS v3 base score is 7.5 out of 10.