CVE-2026-27064CWE-434

WordPress Mailster plugin <= 4.1.17 - Arbitrary File Upload vulnerability

Critical · published July 23, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
41.9
In the wild
Unconfirmed
What it is

Editor Arbitrary File Upload in Mailster <= 4.1.17 versions.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00499 · 41.9th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-07-23T11:17Z
EPSS history
Timeline
  • 23 JUL 11:17Z
    WordPress Mailster plugin <= 4.1.17 - Arbitrary File Upload vulnerability
    cvelistv5