CVE-2025-12674

Critical

Published: 05 November 2025

Published

05 November 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0056 68.6th percentile

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

Summary

CVE-2025-12674 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Wordpress (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 31.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

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

SI-10 directly mandates information input validation mechanisms, addressing the missing file type validation in the create_media() function that enables arbitrary file uploads.

SI-2 Flaw Remediation good match

prevent

SI-2 requires timely identification, reporting, and correction of system flaws, directly supporting patching the vulnerable KiotViet Sync plugin to remediate the upload vulnerability.

SI-3 Malicious Code Protection good match

preventdetect

SI-3 deploys malicious code protection mechanisms that prevent execution of uploaded web shells or other dangerous files resulting from the arbitrary upload vulnerability.

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?

Unauthenticated arbitrary file upload vulnerability in a public-facing WordPress plugin enables remote code execution, directly mapping to T1190: Exploit Public-Facing Application.

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

NVD Description

The KiotViet Sync plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the create_media() function in all versions up to, and including, 1.8.5. This makes it possible for unauthenticated attackers to upload arbitrary…

files on the affected site's server which may make remote code execution possible.

Deeper analysisAI

CVE-2025-12674 is an arbitrary file upload vulnerability in the KiotViet Sync plugin for WordPress, affecting all versions up to and including 1.8.5. The flaw arises from missing file type validation in the create_media() function, allowing attackers to upload arbitrary files to the affected site's server. Classified under CWE-434 (Unrestricted Upload of File with Dangerous Type), it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), marking it as critical due to its high impact on confidentiality, integrity, and availability.

Unauthenticated attackers can exploit this vulnerability remotely with low complexity and no privileges or user interaction required. By uploading malicious files, such as web shells, they can potentially achieve remote code execution on the server hosting the vulnerable WordPress site.

Mitigation details are available in advisories from the Wordfence Threat Intelligence page (https://www.wordfence.com/threat-intel/vulnerabilities/id/7fdd670f-2a71-4c1d-af46-f0fd05352f7e?source=cve) and the plugin's WordPress repository (https://wordpress.org/plugins/kiotvietsync/). Security practitioners should consult these sources for patching guidance, such as updating to a fixed version or temporarily disabling the plugin.