CVE-2026-16038

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 v3.1

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

EPSS

0.24% chance of exploitation in the next 30 days, 15th percentile

Published

2026-08-07

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2026-16036
• CVE-2026-16039
• CVE-2026-16035
• CVE-2026-16041
• CVE-2026-16032
• CVE-2026-16042