CVE-2026-18234: CWE-862 Missing Authorization in MStore API
Description
CVE-2026-18234 is a missing authorization vulnerability in the MStore API WordPress plugin before version 4.21.1. It allows any authenticated user, including those with low privileges such as Subscribers, to mark arbitrary orders as paid without actually deducting wallet balances for most payment methods. This occurs because the plugin does not verify that the order belongs to the requester during wallet payment handling.
CVSS v3.1
Score 6.5medium
Affected software
MStore API
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The MStore API WordPress plugin versions prior to 4.21.1 suffer from a CWE-862 Missing Authorization vulnerability. Specifically, the plugin fails to verify ownership of orders when processing wallet payments, allowing authenticated users to mark orders as paid without proper payment deduction. This flaw enables privilege escalation where low-privileged users can fraudulently mark arbitrary orders as paid.
Potential Impact
An attacker with any authenticated user role, including Subscribers, can mark arbitrary orders as paid without the wallet balance being deducted. This leads to unauthorized order payment confirmation, potentially causing financial loss or fraud for merchants using the plugin. The vulnerability does not impact confidentiality or availability but has a high impact on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict user roles that can access wallet payment functionality or disable the affected payment methods if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-29T12:20:21.389Z
- State
- PUBLISHED
Threat ID: 6a927ab4acd9273b496bde77
Added to database: 08/29/2026, 06:22:44 UTC
Last enriched: 09/09/2026, 22:08:20 UTC
Last updated: 10/12/2026, 06:48:15 UTC
Views: 68
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