CVE-2026-28091

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-2026-28091 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 CM-6 (Configuration Settings) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2026-28091 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, classified as a PHP Remote File Inclusion issue that enables PHP Local File Inclusion, affecting the ThemeREX Coleo WordPress theme in all versions from n/a through 1.1.7. Mapped to CWE-98, it was published on 2026-03-05 and carries a CVSS v3.1 base score of 8.1.

The vulnerability can be exploited over the network (AV:N) by attackers requiring no privileges (PR:N) and no user interaction (UI:N), though it demands high attack complexity (AC:H) with unchanged scope (S:U). Successful exploitation yields high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), potentially allowing attackers to include and execute local files on the server.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/coleo/vulnerability/wordpress-coleo-theme-1-1-7-local-file-inclusion-vulnerability?_s_id=cve documents the local file inclusion vulnerability in the Coleo WordPress theme version 1.1.7.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-9746

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Coleo coleo allows PHP Local File Inclusion.This issue affects Coleo: from n/a through <= 1.1.7.

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?

CVE-2026-28091 is a Local File Inclusion vulnerability in a public-facing WordPress theme, directly enabling remote exploitation of public-facing applications.

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