CVE-2026-16039

MStore API < 4.21.0 - Subscriber+ Order and Customer PII Disclosure via IDOR

The MStore API WordPress plugin before 4.21.0 does not restrict its vendor-orders endpoint to the caller's own orders, allowing any authenticated user, including Subscribers, to read every WooCommerce order in the store together with each customer's personal information.

Affected

MStore API

CVSS v3.1 CNA

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

EPSS

0.34% chance of exploitation in the next 30 days, 26th percentile

Published

2026-08-07

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/85c6ff37-4761-420c-970f-05b2c50d3b28/

References

• CVE Record
• NVD entry