WordPress MStore API plugin <= 4.18.4 - Broken Access Control vulnerability

published 2026-07-13 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-43449

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

FluxBuilder MStore API 4.19.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 3 mo ago (2026-07-13)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

FluxBuilder MStore API

Classification

Weakness

CWE-862 Missing Authorization

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/Wordpress/Plugin/mstore-api/vulnerability/wordpress-mstore-api-plugin-4-18-4-broken-access-control-v
vdb-entry

Sources

CVE List CVE-2026-57375
NVD CVE-2026-57375

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary