CVE-2026-28012

High

Published: 05 March 2026

Published

05 March 2026

Modified

22 April 2026

KEV Added

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Patch

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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0040 32.0th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-28012 is a high-severity PHP Remote File Inclusion (CWE-98) vulnerability. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 32.0th 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 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-28012 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, classified as PHP Remote File Inclusion but enabling PHP Local File Inclusion, in the ThemeREX Gridiron WordPress theme. This issue affects Gridiron versions from n/a through 1.0.14. It is associated with CWE-98 and received a CVSS v3.1 base score of 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to network accessibility and significant impacts.

Remote, unauthenticated attackers can exploit this vulnerability over the network with high attack complexity and no user interaction required. Exploitation allows attackers to perform local file inclusion, potentially leading to high confidentiality, integrity, and availability impacts on the affected system.

The Patchstack advisory (https://patchstack.com/database/Wordpress/Theme/gridiron/vulnerability/wordpress-gridiron-theme-1-0-14-local-file-inclusion-vulnerability?_s_id=cve) documents this local file inclusion vulnerability in the WordPress Gridiron theme version 1.0.14.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-9674

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Gridiron gridiron allows PHP Local File Inclusion.This issue affects Gridiron: from n/a through <= 1.0.14.

CWE(s): CWE-98

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?

The vulnerability is a remote Local File Inclusion (LFI) in a public-facing WordPress theme, directly enabling exploitation of a public-facing application for initial access and potential code execution.

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