What is CVE-2026-111832?

CVE-2026-111832 is a critical-severity vulnerability in Wp Mailster, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2026-10-21.

How severe is CVE-2026-111832?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Arbitrary file upload in Wp Mailster

CVE-2026-111832

Unrestricted Upload of File with Dangerous Type vulnerability in WP Mailster WP Mailster wp-mailster allows Upload a Web Shell to a Web Server.This issue affects WP Mailster: from n/a through 1.9.1.0.

Vulnerability class: Unrestricted File Upload

Published 2026-10-21 · last modified 2026-10-21.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Wp Mailster

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp… (vdb-entry)

Frequently asked questions

What is CVE-2026-111832?: CVE-2026-111832 is a critical-severity vulnerability in Wp Mailster, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2026-10-21.
How severe is CVE-2026-111832?: Critical severity. CVSS v3 base score is 10.0 out of 10.