Cyber Posture

CVE-2026-28020

High

Published: 05 March 2026

Published
05 March 2026
Modified
22 April 2026
KEV Added
—
Patch
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CVSS Score 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0016 37.1th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Description

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Chroma chroma allows PHP Local File Inclusion.This issue affects Chroma: from n/a through <= 1.11.

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match
prevent

Requires validation of filename inputs in PHP include/require statements, directly preventing exploitation of improper filename control leading to local file inclusion.

SI-2 Flaw Remediation good match
prevent

Mandates timely identification, reporting, and patching of known flaws like this LFI vulnerability in the Chroma WordPress theme.

SI-9 Information Input Restrictions good match
prevent

Restricts inputs to safe, whitelisted filenames or paths, blocking malicious local file paths from being processed in PHP includes.

Security SummaryAI

CVE-2026-28020 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, commonly known as PHP Remote File Inclusion, in the ThemeREX Chroma WordPress theme. This flaw enables PHP Local File Inclusion and affects all versions of Chroma from n/a through 1.11 inclusive. The vulnerability is associated with CWE-98 and carries 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 its potential for significant confidentiality, integrity, and availability impacts.

Attackers can exploit this vulnerability remotely over the network without requiring user privileges or interaction, though it demands high attack complexity. Successful exploitation allows unauthenticated attackers to perform local file inclusion, potentially leading to the disclosure of sensitive files, arbitrary code execution, or system compromise depending on the included files and server configuration.

Patchstack has documented this issue in their vulnerability database for the WordPress Chroma theme version 1.11, providing details on the local file inclusion flaw. Security practitioners should refer to https://patchstack.com/database/Wordpress/Theme/chroma/vulnerability/wordpress-chroma-theme-1-11-local-file-inclusion-vulnerability?_s_id=cve for advisory information, including any recommended patches or workarounds. The CVE was published on 2026-03-05.

Details

CWE(s)
CWE-98

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 →
T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
Why these techniques?

LFI vulnerability in public-facing WordPress theme enables exploitation of public-facing application (T1190) and facilitates reading data from local system files (T1005).

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

References