CVE-2026-16038 — CRITICAL (9.1)

Vulnerability Description

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.

CVSS Score

9.1

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Related Weaknesses (CWE)

CWE-862

References

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

FAQ

What is CVE-2026-16038?

CVE-2026-16038 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 unauthen...

How severe is CVE-2026-16038?

CVE-2026-16038 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-16038?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.