CVE-2026-37748

HighPublic PoC

Published: 21 April 2026

Published

21 April 2026

Modified

22 April 2026

KEV Added

—

Patch

—

CVSS Score 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0010 26.6th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-37748 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Sanjay1313 Visitor Management System. Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly requires validation of MIME type, file extension, and content for uploaded files, preventing unrestricted upload of PHP webshells.

SI-2 Flaw Remediation good match

prevent

Mandates identification, reporting, and correction of flaws like the unrestricted file upload in admin_user_insert.php and update_1.php.

SI-3 Malicious Code Protection good match

preventdetect

Employs malicious code protection mechanisms with real-time scans at network entry points to block or detect PHP webshell uploads and execution.

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 →

T1100 Web Shell Persistence

A Web shell is a Web script that is placed on an openly accessible Web server to allow an adversary to use the Web server as a gateway into a network.

attack.mitre.org →

Why these techniques?

Unrestricted file upload without validation directly enables web shell deployment (T1100) via exploitation of a public-facing web application (T1190).

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

NVD Description

Visitor Management System 1.0 by sanjay1313 is vulnerable to Unrestricted File Upload in vms/php/admin_user_insert.php and vms/php/update_1.php. The move_uploaded_file() function is called without any MIME type, extension, or content validation, allowing an authenticated admin to upload a PHP webshell and achieve…

Remote Code Execution on the server.

Deeper analysisAI

CVE-2026-37748, published on 2026-04-21, is an unrestricted file upload vulnerability in Visitor Management System 1.0 developed by sanjay1313. The issue resides in the files vms/php/admin_user_insert.php and vms/php/update_1.php, where the move_uploaded_file() PHP function is invoked without validation of MIME type, file extension, or file content. This allows malicious files to be stored and executed on the server.

An authenticated administrator (PR:H) can exploit the vulnerability remotely (AV:N) with low attack complexity (AC:L) and no user interaction (UI:N). By uploading a PHP webshell, the attacker achieves remote code execution, leading to high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) within the unchanged scope (S:U). The vulnerability carries a CVSS 3.1 base score of 7.2 and maps to CWE-434 (Unrestricted Upload of File with Dangerous Type).

Mitigation details and advisories are referenced in GitHub repositories, including https://github.com/menevarad007/CVE-2026-37748 and https://github.com/sanjay1313/Visitor-Management-System. Security practitioners should review these for patches, workarounds, or updated versions of the software.