CVE-2026-18234
Received Received - Intake

Unauthorized Order Payment in MStore API WordPress Plugin

Publication date: 2026-08-29

Last updated on: 2026-08-29

Assigner: WPScan

Description
The MStore API WordPress plugin before 4.21.1 does not verify that the order targeted by its wallet payment handling belongs to the requester, and does not deduct the wallet balance for most payment methods, allowing any authenticated user, including Subscribers, to mark arbitrary orders as paid without any payment being taken.

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Meta Information

Published
2026-08-29
Last Modified
2026-08-29
Generated
2026-08-29
AI Q&A
2026-08-29
EPSS Evaluated
N/A
NVD
CVE-2026-18234
EUVD
EUVD-2026-68048

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mstore_api mstore_api to 4.21.1 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the MStore API WordPress plugin before version 4.21.1 allows authenticated users, including Subscribers, to mark any order as paid without making an actual payment. The plugin fails to verify if the order belongs to the requester and does not deduct the wallet balance for most payment methods.

Detection Guidance

Check the installed version of the MStore API WordPress plugin. If it is below 4.21.1, the system is vulnerable. Use commands like 'wp plugin list' in WordPress CLI or inspect the plugin files directly.

Impact Analysis

An attacker could exploit this to get free access to paid orders or services by marking them as paid without paying. This could lead to financial losses for the store owner and disrupt legitimate transactions.

Mitigation Strategies

Update the MStore API plugin to version 4.21.1 or later immediately. If updating is not possible, restrict user roles to prevent Subscribers from accessing payment-related functions.

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