Cyber Posture

CVE-2026-27986

High

Published: 05 March 2026

Published
05 March 2026
Modified
22 April 2026
KEV Added
—
Patch
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CVSS Score 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0016 37.1th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Description

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX OsTende ostende allows PHP Local File Inclusion.This issue affects OsTende: from n/a through <= 1.4.3.

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match
prevent

Directly remediates the specific flaw in the OsTende WordPress theme's PHP include/require handling, preventing exploitation of CVE-2026-27986.

SI-10 Information Input Validation good match
prevent

Validates user-supplied inputs at web interfaces to ensure filenames used in PHP include/require statements cannot include arbitrary local files.

CM-6 Configuration Settings partial match
prevent

Enforces restrictive PHP configuration settings like open_basedir and disabled allow_url_include to limit the scope of local file inclusion even if input validation fails.

Security SummaryAI

CVE-2026-27986 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, affecting the ThemeREX OsTende WordPress theme in versions from n/a through 1.4.3. Published on 2026-03-05, it 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) and maps to CWE-98.

Unauthenticated remote attackers can exploit this vulnerability over the network, requiring high attack complexity but no user interaction or privileges. Successful exploitation grants high-impact access to confidentiality, integrity, and availability, allowing inclusion and potential execution of local files on the affected server.

The Patchstack advisory provides details on this Local File Inclusion vulnerability in the OsTende WordPress theme version 1.4.3, available at https://patchstack.com/database/Wordpress/Theme/ostende/vulnerability/wordpress-ostende-theme-1-4-3-local-file-inclusion-vulnerability?_s_id=cve.

Details

CWE(s)
CWE-98

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 a remote file inclusion flaw in a public-facing WordPress theme, directly enabling exploitation of a public-facing application.

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

References