CVE-2026-16041 MStore API < 4.21.0 - Unauthenticated Product Review Creation
Unauthenticated attackers can create fake product reviews on WooCommerce stores configured to restrict reviews to verified owners.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16041?
CVE-2026-16041 is a high-severity missing authorization vulnerability in Unknown MStore API, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-16041?
How do I fix CVE-2026-16041?
No fix has been published for CVE-2026-16041 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16041 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16041 exists.
Sources
Also known as GHSA-9px3-jf5v-3473.