CVE-2026-27064

WordPress Mailster plugin <= 4.1.17 - Arbitrary File Upload vulnerability

State: Published
Severity: 9.1 Critical
Published: Jul 23, 2026
Updated: Jul 23, 2026
Reserved: Feb 17, 2026

Description

Editor Arbitrary File Upload in Mailster <= 4.1.17 versions.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H	Patchstack

Weaknesses

CWE-434 Unrestricted Upload of File with Dangerous Type

Affected Products

Product	Versions
MailsterEverPress	4.1.17 and earlierAffectedfrom 4.1.18Not affected

References

https://patchstack.com/database/wordpress/plugin/mailster/vulnerability/wordpress-mailster-plugin-4-1-17-arbitrary-file-upload-vulnerability?_s_id=cvevdb-entry

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