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MStore API CVE-2026-18234

| EUVDEUVD-2026-68048 MEDIUM
Missing Authorization (CWE-862)
2026-08-29 WPScan GHSA-jmq8-gg6r-m32f
6.5
CVSS 3.1 · Vendor: WPScan
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Severity by source

Vendor (WPScan) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
vuln.today AI
6.5 MEDIUM

Network-reachable REST endpoint, low complexity, subscriber auth required (PR:L), no confidentiality or availability impact, only integrity.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (WPScan).

CVSS VectorVendor: WPScan

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

5
CVE Published
Aug 31, 2026 - 10:50 cve.org
MEDIUM 6.5
Analysis Generated
Aug 30, 2026 - 01:27 vuln.today
CVSS changed
Aug 30, 2026 - 01:22 NVD
6.5 (MEDIUM)
Patch available
Aug 29, 2026 - 08:16 EUVD
CVE Published
Aug 29, 2026 - 06:00 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Broken order authorization in MStore API WordPress plugin (before 4.21.1) allows any authenticated user, including low-privilege Subscribers, to mark arbitrary orders as paid without actual payment being taken. The plugin's wallet payment handler neither verifies that the targeted order belongs to the requesting user nor deducts the wallet balance for most payment methods, enabling financial fraud against WooCommerce stores. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Requires an authenticated WordPress session at subscriber level or above - the attacker must have or be able to create a registered user account on the target site (common on public WooCommerce storefronts with open registration). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N) accurately reflects the attack profile: network-reachable, low complexity, requiring only subscriber-level credentials, with high integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update MStore API to version 4.21.1 or later, which is the vendor-released patch per WPScan and NVD. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-18233 MEDIUM POC
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MStore API WordPress plugin before 4.21.1 allows any authenticated user - including the lowest-privilege Subscriber role

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CVE-2026-18234 vulnerability details – vuln.today

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