How to fix EUVD-2025-201376?

Within 24 hours: Audit all WordPress installations for ContentStudio plugin presence and document affected sites. Within 7 days: Disable the ContentStudio plugin on all affected WordPress sites and restrict author/editor role assignments to trusted personnel only. Within 30 days: Evaluate alternative plugins or vendors with active security patching, and implement enhanced access controls and activity monitoring for remaining administrative accounts.

Is WordPress affected by EUVD-2025-201376?

The ContentStudio WordPress plugin contains a critical file upload vulnerability that allows internal users with author-level access to upload malicious files and potentially execute arbitrary code on your web servers.

EUVD-2025-201376

| CVE-2025-12181 HIGH

2025-12-05 [email protected]

8.8

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 17:08 euvd

EUVD-2025-201376

CVE Published

Dec 05, 2025 - 06:16 nvd

HIGH 8.8

Description

The ContentStudio plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the cstu_update_post() function in all versions up to, and including, 1.3.7. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Analysis

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.4

CVSS: +44

POC: 0

EUVD-2025-201376 vulnerability details – vuln.today

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EUVD-2025-201376

CVSS Vector

Lifecycle Timeline

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EUVD-2025-201376

CVSS Vector

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External POC / Exploit Code