What is CVE-2026-57375?

CVE-2026-57375 is a medium-severity vulnerability in Fluxbuilder Mstore API, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-07-13.

How severe is CVE-2026-57375?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Fluxbuilder Mstore API

CVE-2026-57375

Missing Authorization vulnerability in FluxBuilder MStore API mstore-api allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects MStore API: from n/a through <= 4.18.4.

Vulnerability class: Broken Access Control

Published 2026-07-13 · last modified 2026-07-13.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.1th percentile), scored 2026-10-12.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Fluxbuilder Mstore API — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

patchstack.com/database/Wordpress/Plugin/mstore-api/vulnerability/wordpress-mst… (vdb-entry)

Frequently asked questions

What is CVE-2026-57375?: CVE-2026-57375 is a medium-severity vulnerability in Fluxbuilder Mstore API, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-07-13.
How severe is CVE-2026-57375?: Medium severity. CVSS v3 base score is 6.5 out of 10.