CVE-2026-18233

MStore API < 4.21.1 - Subscriber+ Arbitrary Order Completion

MEDIUM

6.5

CVSS Score

Published: August 29, 2026 at 06:00 AM UTC

Updated: August 31, 2026 at 08:26 PM UTC

1 product affected across 1 vendorMStore API

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

The MStore API WordPress plugin before 4.21.1 does not verify that the order targeted by one of its delivery endpoints belongs to the requester, allowing any authenticated user, including Subscribers, to mark arbitrary orders as completed and paid without any payment being made.

Affected

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

MStore API · Inspireuiwordpress-plugin

60%

v < 4.21.1

Affected range stops below 4.21.1, 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/241c0394-8dfa-475c-a91b-e2b5e47add53/

SSVC — Action Prioritization

SSVCNo known exploitNot 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: NONE
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-862

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