CVE-2025-6326

High

Published: 18 December 2025

Published

18 December 2025

Modified

15 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 0.0034 26.0th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-6326 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 26.0th 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-2025-6326 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, referred to as PHP Remote File Inclusion, in the AncoraThemes Inset WordPress theme. It enables PHP Local File Inclusion and affects the Inset theme from unknown initial versions through 1.18.0.

The vulnerability carries a CVSS v3.1 base score of 8.1 (High), with an attack vector of network (AV:N), high attack complexity (AC:H), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). Unauthenticated remote attackers meeting the high complexity requirements can exploit it to achieve these impacts, mapped to CWE-98.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/inset/vulnerability/wordpress-inset-1-18-0-local-file-inclusion-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-204092

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in AncoraThemes Inset inset allows PHP Local File Inclusion.This issue affects Inset: from n/a through <= 1.18.0.

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?

T1190 directly matches exploitation of a public-facing WordPress theme vulnerability. T1005 is facilitated by LFI enabling unauthorized remote access to local files on the server.

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