CVE-2026-27064

CRITICAL

WordPress Mailster plugin <= 4.1.17 - Arbitrary File Upload vulnerability

Title source: cna
STIX 2.1

Description

Editor Arbitrary File Upload in Mailster <= 4.1.17 versions.

References (1)

Core 1

Scores

CVSS v3 9.1
EPSS 0.0028
EPSS Percentile 20.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-434
Status published
Products (1)
EverPress/Mailster < 4.1.17
Published Jul 23, 2026
Tracked Since Jul 23, 2026