Cyber Resilience

CVE-2025-12673

Critical

Published: 06 December 2025

Published
06 December 2025
Modified
15 April 2026
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0037 59.4th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-12673 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 40.6% 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).

Deeper analysis

CVE-2025-12673 is an arbitrary file upload vulnerability in the Flex QR Code Generator plugin for WordPress, affecting all versions up to and including 1.2.7. The flaw arises from missing file type validation in the update_qr_code() function, classified under CWE-434. 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), indicating critical severity due to its potential for high-impact confidentiality, integrity, and availability effects.

Unauthenticated attackers can exploit this vulnerability remotely with low complexity and no user interaction or privileges required. By leveraging the deficient validation, they can upload arbitrary files to the affected site's server, which may enable remote code execution depending on server configuration and file types processed.

Advisories and patch information are detailed in references such as the Wordfence threat intelligence page, WordPress plugin trac changeset 3412218, and researcher analyses on GitHub (d0n601/CVE-2025-12673) and ryankozak.com. Mitigation centers on updating the plugin beyond version 1.2.7 to address the validation gap.

EU & UK References

Vulnerability details

The Flex QR Code Generator plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the update_qr_code() function in all versions up to, and including, 1.2.7. This makes it possible for unauthenticated attackers to…

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

CWE(s)
CWE-434

Related Threats

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?

Arbitrary file upload vulnerability in a public-facing WordPress plugin directly enables exploitation of public-facing applications (T1190) for remote code execution via unauthenticated file upload.

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

CVEs Like This One

CVE-2024-56975Shared CWE-434
CVE-2019-25580Shared CWE-434
CVE-2026-27636Shared CWE-434
CVE-2026-4809Shared CWE-434
CVE-2020-37090Shared CWE-434
CVE-2026-24729Shared CWE-434
CVE-2026-28289Shared CWE-434
CVE-2026-1730Shared CWE-434
CVE-2023-50897Shared CWE-434
CVE-2025-70457Shared CWE-434

Affected Assets

Wordpress
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Requires timely patching of the vulnerable Flex QR Code Generator plugin up to version 1.2.7, directly eliminating the arbitrary file upload flaw in update_qr_code().

SI-10 Information Input Validation good match
prevent

Enforces validation of file types and contents for uploads, directly countering the missing file type validation that enables arbitrary file uploads.

SI-3 Malicious Code Protection good match
preventdetect

Scans and blocks malicious code in uploaded files at entry points, mitigating remote code execution from arbitrary uploads even if validation fails.

References