CVE-2026-27342

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-2026-27342 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 RA-5 (Vulnerability Monitoring and Scanning) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2026-27342 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 Mikado-Themes TopFit - Fitness and Gym WordPress Theme (topfit). This flaw impacts all versions from n/a through 1.9, stemming from CWE-98.

The vulnerability 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 exploitation over the network by unauthenticated attackers without user interaction, albeit requiring high attack complexity. Successful exploitation allows attackers to achieve high impacts on confidentiality, integrity, and availability, potentially enabling local file inclusion to read sensitive data or execute arbitrary code via included PHP files.

Patchstack advisories document the vulnerability specifically in TopFit theme version 1.9, available at https://patchstack.com/database/Wordpress/Theme/topfit/vulnerability/wordpress-topfit-fitness-and-gym-wordpress-theme-theme-1-9-local-file-inclusion-vulnerability?_s_id=cve.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-9615

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in Mikado-Themes TopFit - Fitness and Gym WordPress Theme topfit allows PHP Local File Inclusion.This issue affects TopFit - Fitness and Gym WordPress Theme: from…

n/a through <= 1.9.

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-2026-27342 is an unauthenticated remote Local File Inclusion vulnerability in a public-facing WordPress theme via improper PHP include/require filename controls, directly enabling T1190 (Exploit Public-Facing Application) for unauthorized file access and potential code execution.

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