CVE-2026-27990
Published: 05 March 2026
Summary
CVE-2026-27990 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 38.1th 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).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the improper filename control flaw in the ConFix theme's PHP include/require statements by identifying, reporting, and patching affected versions <=1.013.
Requires validation of filenames and paths used in PHP include/require operations to block malicious local file inclusion attempts.
Enables scanning for this specific LFI vulnerability in WordPress themes like ConFix to identify and prioritize remediation.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE-2026-27990 enables unauthenticated remote local file inclusion in a public-facing WordPress theme, directly facilitating exploitation of public-facing applications via T1190.
NVD Description
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX ConFix confix allows PHP Local File Inclusion.This issue affects ConFix: from n/a through <= 1.013.
Deeper analysisAI
CVE-2026-27990 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 ConFix WordPress theme. This issue impacts ConFix versions from n/a through 1.013 and is linked to 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 high severity due to network accessibility and potential for significant impacts.
Unauthenticated remote attackers can exploit this vulnerability over the network with high attack complexity and without requiring user interaction. Successful exploitation grants high-level impacts on confidentiality, integrity, and availability, allowing attackers to perform local file inclusion on the targeted system.
Patchstack provides details on the vulnerability in the WordPress ConFix theme version 1.013 via its advisory at https://patchstack.com/database/Wordpress/Theme/confix/vulnerability/wordpress-confix-theme-1-013-local-file-inclusion-vulnerability?_s_id=cve, which security practitioners should consult for mitigation guidance.
Details
- CWE(s)