Cyber Resilience

CVE-2026-39623

High

Published: 08 April 2026

Published
08 April 2026
Modified
24 April 2026
KEV Added
—
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 0.0015 34.9th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-39623 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 34.9th 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-2026-39623 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 (CWE-98). It affects the Biolife WordPress theme developed by kutethemes, impacting all versions from n/a through 3.2.3.

The vulnerability has a CVSS v3.1 base score of 7.5 (High), with vector AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Low-privileged users (PR:L) can exploit it over the network (AV:N) without user interaction (UI:N), though it requires high attack complexity (AC:H). Successful exploitation allows attackers to achieve high impacts on confidentiality, integrity, and availability.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/biolife/vulnerability/wordpress-biolife-theme-3-2-3-local-file-inclusion-vulnerability?_s_id=cve.

EU & UK References

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in kutethemes Biolife biolife allows PHP Local File Inclusion.This issue affects Biolife: from n/a through <= 3.2.3.

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?

LFI vulnerability in public-facing WordPress theme directly enables exploitation of public-facing applications.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2026-28087Shared CWE-98
CVE-2025-23952Shared CWE-98
CVE-2026-32505Shared CWE-98
CVE-2025-48149Shared CWE-98
CVE-2025-60058Shared CWE-98
CVE-2025-49994Shared CWE-98
CVE-2026-24531Shared CWE-98
CVE-2025-67527Shared CWE-98
CVE-2025-69396Shared CWE-98
CVE-2025-62067Shared CWE-98

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly counters the improper filename control in PHP include/require by mandating validation of user-supplied inputs to prevent local file inclusion.

SI-2 Flaw Remediation good match
prevent

Requires identification, reporting, and correction of the specific file inclusion flaw in the Biolife WordPress theme versions through 3.2.3.

SI-9 Information Input Restrictions good match
prevent

Enforces restrictions on filename inputs at application boundaries to block traversal sequences or unauthorized paths exploited in this LFI vulnerability.

References