CVE-2026-27543

WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability

8.1 High

CVE-2026-27543 is a high vulnerability (CVSS 8.1) in Fluxbuilder Mstore Api, published August 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. No source names a fixed version.

What does this mean?

Severity: 8.1 HighCVSS 3.1, CVE List
Exploit chance: 0.37%EPSS, 31st percentile
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: No fix listedNo source names one

Description

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.37%Up 0.1 points since Aug 14, 2026

Affected products

What each source reports

CVE List Score used8.1

WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Record: CVE-2026-27543
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-266
Updated: 2026-11-02

EUVDEUVD-2026-579388.1

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Record: EUVD-2026-57938
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-cvhf-m4qh-hf7x8.1

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Record: GHSA-cvhf-m4qh-hf7x
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-266
Updated: 2026-11-02

NVD8.1

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Record: CVE-2026-27543
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-266
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

Description

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

Affected products

What each source reports

History

References