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Fencer Intel
high 8.1

CVE-2026-27543 json

WordPress MStore API plugin <= 4.20.0 - Privilege Escalation vulnerability

published 2mo ago modified 17d ago also EUVD-2026-57938

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.

Patch / fix

  • FluxBuilder MStore API 4.21.0

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • FluxBuilder MStore API

Classification

Weakness
  • CWE-266 Incorrect Privilege Assignment
Technology feeds

References

Sources

Fencer Intel 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.