CVE-2026-111832CWE-434unrestricted-file-upload

CVE-2026-111832

Critical · published October 21, 2026

CVSS v3.1
10.0
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00405 · 33.6th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-10-21T19:17Z
References (1)
https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-9-1-0-arbitrary-file-upload-vulnerability?_s_id=cve · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 14:00Z
    WordPress WP Mailster plugin <= 1.9.1.0 - Arbitrary File Upload vulnerability
    cvelistv5
  • 21 OCT 14:00Z
    WordPress WP Mailster plugin <= 1.9.1.0 - Arbitrary File Upload vulnerability
    cvelistv5