High severity · published Aug 7, 2026
CVE-2026-16041
MStore API < 4.21.0 - Unauthenticated Product Review Creation
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
MStore API ·
before 4.21.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16041
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16041
wpscan.com
https://wpscan.com/vulnerability/0e7d8a17-0901-45b5-959c-2c1ef1316047/
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