CVE-2026-28011

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 0.0042 33.1th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-28011 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 33.1th 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-2026-28011 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, classified as PHP Remote File Inclusion, present in the ThemeREX Yottis WordPress theme. It enables PHP Local File Inclusion and affects versions from n/a through 1.0.10.

The vulnerability has 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 exploitation over the network by unauthenticated attackers requiring high attack complexity and no user interaction. Successful exploitation can result in high impacts to confidentiality, integrity, and availability, mapped to CWE-98.

The Patchstack advisory documents this Local File Inclusion vulnerability specifically in the WordPress Yottis theme version 1.0.10.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-9673

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Yottis yottis allows PHP Local File Inclusion.This issue affects Yottis: from n/a through <= 1.0.10.

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 →

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 unauthorized data extraction from local system files (T1005).

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