CVE-2026-27543

WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability

Published Aug 13, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Remediation

Vendor Solution

Update the WordPress MStore API plugin to the latest available version (at least 4.21.0).

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Fluxbuilder
Fluxbuilder mstore Api
Wordpress
Wordpress wordpress
Vendors & Products Fluxbuilder
Fluxbuilder mstore Api
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Description Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.
Title WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability
Weaknesses CWE-266
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Patchstack
Published
Updated
Aug 13, 2026, 3:16 PM
Reserved
Feb 20, 2026, 11:18 AM
Status
Deferred
Published
Aug 13, 2026, 2:16 PM
Modified
Oct 23, 2026, 6:10 PM