CVE-2026-111832criticalCWE-434

CVE-2026-111832: critical vulnerability in WP Mailster

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

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 10epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
WP Mailster · WP Mailster
Related CVEs — WP Mailster

In the same product, most dangerous first.

CVE-2026-111829MEDIUMWordPress WP Mailster plugin <= 1.9.1.0 - Local File Inclusion vulnerabilityEPSS 0.3%CVE-2026-111830HIGHWordPress WP Mailster plugin <= 1.9.1.0 - Cross Site Scripting (XSS) vulnerabilityEPSS 0.2%CVE-2026-105055MEDIUMWordPress WP Mailster plugin <= 1.9.0.0 - Broken Access Control vulnerabilityEPSS 0.2%