CVE-2025-14390

High

Published: 10 December 2025

Published

10 December 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score 0.0010 27.2th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-14390 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Wordpress (inferred from references). Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 27.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SC-23 (Session Authenticity) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Requires validation of inputs such as nonces and file types to block forged CSRF requests and unrestricted dangerous file uploads.

SC-23 Session Authenticity good match

prevent

Mandates session authenticity mechanisms like anti-CSRF tokens to prevent exploitation via forged requests tricking authenticated administrators.

SI-2 Flaw Remediation good match

prevent

Directly addresses flaw remediation by requiring updates to the vulnerable Video Merchant plugin versions to fix missing nonce validation.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

CSRF vulnerability in public-facing WordPress plugin enables unauthenticated exploitation for arbitrary file upload and RCE.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

The Video Merchant plugin for WordPress is vulnerable to Cross-Site Request Forgery in version <= 5.0.4. This is due to missing or incorrect nonce validation on the video_merchant_add_video_file() function. This makes it possible for unauthenticated attackers to upload arbitrary files…

that make remote code execution possible via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Deeper analysisAI

CVE-2025-14390, published on 2025-12-10, is a Cross-Site Request Forgery (CSRF) vulnerability in the Video Merchant plugin for WordPress, affecting versions up to and including 5.0.4. The flaw arises from missing or incorrect nonce validation in the video_merchant_add_video_file() function, which enables unauthenticated file uploads. It carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H) and is associated with CWE-434 (Unrestricted Upload of File with Dangerous Type).

Unauthenticated attackers can exploit this vulnerability over the network with low complexity by tricking a site administrator into executing a forged request, such as by clicking a malicious link. If successful, attackers can upload arbitrary files, enabling remote code execution on the compromised WordPress site with high impacts on confidentiality, integrity, and availability.

Mitigation guidance is available in advisories from Wordfence (https://www.wordfence.com/threat-intel/vulnerabilities/id/7cbe39ae-d10b-432f-afab-682948de2521?source=cve) and the plugin's WordPress.org page (https://wordpress.org/plugins/video-merchant). Security practitioners should update the Video Merchant plugin to a version beyond 5.0.4 to address the missing nonce validation.