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CVE-2026-18234

MediumPublished

MStore API < 4.21.1 - Subscriber+ Arbitrary Order Payment Bypass via Wallet

Published: Aug 29, 2026
Updated: Aug 30, 2026
Assigning CNA: WPScan
Evidence observed: Sep 26, 2026

Primary CVSS

6.5/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 7.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-PoCsPoC
A community-curated, verified collection of Proof-of-Concept exploits for CVEs disclosed in 2026.

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