CVE-2026-27543 HIGH

CVE-2026-27543: WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability

Vendor Fluxbuilder
Product MStore API
Weakness CWE-266
Published August 13, 2026
Last update August 13, 2026
View on NVD All CVEs

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Explanation of Vulnerability in Simple Terms

02Summary

MStore API through version 4.20.0 contains a privilege assignment flaw that allows unauthenticated attackers to gain unauthorized access to sensitive functions. The vulnerability requires specific network conditions to exploit but can result in complete compromise of confidentiality, integrity, and availability. Site administrators should update to a version newer than 4.20.0 as soon as a patch becomes available.

What an attacker can do

03Attacker Capabilities

Read, modify, or delete data and run code on the site without authentication.

Potential impact on your site

04Site Impact

Complete unauthorized access to site data and functionality; potential data breach and site takeover.

Conditions required to exploit

05Prerequisites

Network access to the MStore API; no user authentication or interaction required.

Key dates

06Disclosure timeline

August 13, 2026 CVE published

Related vulnerabilities

08Related CVE

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