CVE-2026-16038
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
The MStore API WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.
Risk Assessment
The risk includes financial losses for the store, as attackers can receive products or services without paying. It may also lead to abuse and disruption in order management.
Recommendation
Update the MStore API plugin to version 4.21.0 or later. Also, implement payment verification with the gateway before marking an order as paid.
Original NVD description (English source)
The MStore API WordPress plugin before 4.21.0 does not verify the payment with the payment gateway before marking an order as paid on several of its payment-completion endpoints, allowing an unauthenticated attacker to mark an arbitrary order fully paid without paying and obtain goods or services for free.