PT-2026-63809 · Everpress · Mailster

CVE-2026-27064 · Published 2026-07-23 · Updated 2026-07-23

NVD

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Editor Arbitrary File Upload in Mailster <= 4.1.17 versions.

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2026-27064

Affected Products

Mailster

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-27064 · Security Note
• https://patchstack.com/database/wordpress/plugin/mailster/vulnerability/wordpress-mailster-plugin-4-1-17-arbitrary-file-upload-vulnerability?_s_id=cve · Note