CVE-2026-111832

WordPress WP Mailster plugin <= 1.9.1.0 - Arbitrary File Upload vulnerability

Published Oct 21, 2026 CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

Update the WordPress WP Mailster plugin to the latest available version (at least 1.9.2.0).

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions wp Mailster
Wpmailster
Wpmailster wp Mailster
Vendors & Products Wordpress-extensions
Wordpress-extensions wp Mailster
Wpmailster
Wpmailster wp Mailster
Type Values Removed Values Added
Description 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.
Title WordPress WP Mailster plugin <= 1.9.1.0 - Arbitrary File Upload vulnerability
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Patchstack
Published
Updated
Oct 21, 2026, 5:19 PM
Reserved
Oct 17, 2026, 12:17 AM
Status
Deferred
Published
Oct 21, 2026, 3:17 PM
Modified
Oct 21, 2026, 6:19 PM