Cyber Resilience

CVE-2026-28017

High

Published: 05 March 2026

Published
05 March 2026
Modified
22 April 2026
KEV Added
—
Patch
—
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-2026-28017 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-2026-28017 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, affecting the ThemeREX Green Thumb (greenthumb) WordPress theme. This issue impacts versions from n/a through 1.1.12 and is associated with CWE-98.

The vulnerability has a CVSS 3.1 base score of 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating exploitation over the network by an unauthenticated attacker with no user interaction required, though high attack complexity is needed. Successful exploitation allows the attacker to achieve high impacts on confidentiality, integrity, and availability, potentially through local file inclusion leading to unauthorized file access or execution.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/greenthumb/vulnerability/wordpress-green-thumb-theme-1-1-12-local-file-inclusion-vulnerability?_s_id=cve details this local file inclusion vulnerability in the WordPress Green Thumb theme version 1.1.12.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Green Thumb greenthumb allows PHP Local File Inclusion.This issue affects Green Thumb: from n/a through <= 1.1.12.

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 an LFI in a public-facing WordPress theme, directly enabling exploitation of a public-facing application (T1190) for remote unauthenticated access to read sensitive local files or potentially execute code.

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

CVEs Like This One

CVE-2025-58923Shared CWE-98
CVE-2025-69057Shared CWE-98
CVE-2024-54263Shared CWE-98
CVE-2026-28035Shared CWE-98
CVE-2026-28024Shared CWE-98
CVE-2025-67525Shared CWE-98
CVE-2025-22707Shared CWE-98
CVE-2025-69375Shared CWE-98
CVE-2026-22443Shared CWE-98
CVE-2025-53198Shared CWE-98

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly prevents LFI exploitation by validating and sanitizing user-supplied filenames used in PHP include/require statements within the Green Thumb theme.

SI-2 Flaw Remediation good match
prevent

Remediates the specific LFI vulnerability in Green Thumb theme versions through 1.1.12 by applying timely patches or updates.

CM-6 Configuration Settings partial match
prevent

Enforces secure configuration settings for PHP and web servers, such as disabling dangerous functions like allow_url_include, to mitigate file inclusion risks.

References