CVE-2026-16038

9.1 criticalEPSS 0.4%

Critical (9.1). EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2026-08-07
Modified: 2026-08-26
Record from: the NVD, synced 2026-10-19

References

https://wpscan.com/vulnerability/6321d247-39c7-43a6-a528-202e1118a5d5/

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