CVE-2025-67521

High

Published: 09 December 2025

Published

09 December 2025

Modified

27 April 2026

KEV Added

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Patch

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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0011 28.8th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-67521 is a high-severity PHP Remote File Inclusion (CWE-98) vulnerability. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.8th 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-2025-67521 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, classified as PHP Remote File Inclusion but enabling PHP Local File Inclusion (LFI), in the Select-Themes Select Core WordPress plugin (select-core). This flaw affects all versions from n/a through those prior to 2.6 and is associated with CWE-98. Published on 2025-12-09, it carries a CVSS v3.1 base score of 7.5 (High), with the vector AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

The vulnerability can be exploited by low-privileged authenticated users (PR:L) with network access (AV:N), though it requires high attack complexity (AC:H) and no user interaction (UI:N). Successful exploitation allows attackers to perform local file inclusion, potentially leading to high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), such as unauthorized access to sensitive local files or arbitrary code execution depending on the included files.

Patchstack's advisory at https://patchstack.com/database/Wordpress/Plugin/select-core/vulnerability/wordpress-select-core-plugin-2-6-local-file-inclusion-vulnerability?_s_id=cve details the local file inclusion vulnerability in the Select Core plugin and indicates that updating to version 2.6 addresses the issue for affected WordPress installations.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-202123

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in Select-Themes Select Core select-core allows PHP Local File Inclusion.This issue affects Select Core: from n/a through < 2.6.

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?

The vulnerability is an unauthenticated remote/local file inclusion (LFI/RFI) in a public-facing WordPress plugin, enabling arbitrary file reads and potential code execution, directly mapping to exploitation of public-facing applications.

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