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CVE-2026-16039

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

MEDIUM
6.5
CVSS Score
Published: August 7, 2026 at 06:00 AM UTC
Updated: August 26, 2026 at 04:31 PM UTC
1 product affected across 1 vendorMStore API

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MStore API· Inspireuiwordpress-plugin
60%
v < 4.21.0
Affected range stops below 4.21.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description
Source: cverecord
https://wpscan.com/vulnerability/85c6ff37-4761-420c-970f-05b2c50d3b28/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-639

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