CVE-2026-16030
Received Received - Intake

Authentication Bypass in MStore API WordPress Plugin

Publication date: 2026-08-07

Last updated on: 2026-08-07

Assigner: WPScan

Description
The MStore API WordPress plugin before 4.21.0 does not correctly verify the cryptographic signature of the token used to authenticate its phone-based login, allowing unauthenticated attackers who know a registered user's phone number to forge a token and take over that user's account, including administrator accounts.

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Meta Information

Published
2026-08-07
Last Modified
2026-08-07
Generated
2026-08-07
AI Q&A
2026-08-07
EPSS Evaluated
N/A
NVD
CVE-2026-16030
EUVD
EUVD-2026-54385

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mstore_api mstore_api to 4.21.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

The MStore API WordPress plugin before version 4.21.0 has an authentication bypass vulnerability. It fails to verify the cryptographic signature of tokens used for phone-based login, allowing attackers who know a user's phone number to forge a valid token and take over that user's account, including administrator accounts.

Detection Guidance

Check the installed version of the MStore API plugin in your WordPress admin panel. If the version is below 4.21.0, the system is vulnerable. Look for unusual login activity or unauthorized account access, especially via phone-based authentication.

Impact Analysis

Unauthenticated attackers could gain control of any user account, including administrator accounts, by exploiting this flaw. This could lead to unauthorized access to sensitive data, website defacement, or further compromise of the WordPress site.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access control. Organizations may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Immediately update the MStore API plugin to version 4.21.0 or later through the WordPress admin panel. If updating is not possible, disable the plugin temporarily until an update is applied.

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