What is CVE-2026-13158?

CVE-2026-13158 is a high-severity vulnerability in Everest Toolkit, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-08-01.

How severe is CVE-2026-13158?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2026-13158 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Everest Toolkit

CVE-2026-13158

The Everest Toolkit WordPress plugin through 1.2.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site administrators on multisite) to upload executable PHP files to the uploads directory.

Vulnerability class: Unrestricted File Upload

EPSS: 0.003 (28.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Unknown Everest Toolkit — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

MinhHK68/CVE-2026-13158

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-13158?: CVE-2026-13158 is a high-severity vulnerability in Everest Toolkit, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-08-01.
How severe is CVE-2026-13158?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2026-13158 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.