Security audit and enterprise hardening of a NativePHP/Electron desktop application.The application is a time-tracking solution for mechanical engineering, built on NativePHP and Electron. Before rolling it out to enterprise environments with SCCM, Intune, and GPO policies, the application needed a systematic security review and hardening.
The Problem
The client planned to deploy the application in regulated corporate environments — clinics, government agencies, large enterprises. These environments have strict software security requirements:
SCCM/Intune deployment requires signed packages and predictable behavior
GPO policies restrict network access, registry access, and filesystem operations
Compliance requirements demand verifiable security measures in the backend and API layer
The application was functionally stable but not hardened for these environments.
Approach
The audit followed a structured methodology:
Threat Modeling: Identifying attack surfaces of a desktop app with backend connectivity — local storage, API communication, Electron IPC, update mechanism
Code Review (Backend & API): Systematic analysis of the Laravel backend for OWASP Top 10 vulnerabilities
Vulnerability Assessment: Identification of concrete vulnerabilities:
Cross-Site Scripting (XSS) in input processing
Command Injection in specific backend endpoints
Missing Input Validation at API boundaries
Insecure Defaults in the Electron configuration
Remediation: Fixing all identified vulnerabilities in the backend and API layer
Solution
The hardening covered multiple layers:
Input Validation & Sanitization: Strict validation of all API inputs, escape mechanisms against XSS and injection
Electron Security Hardening: Content Security Policy, disabled nodeIntegration, enabled contextIsolation, secure IPC communication
API Layer Security: Rate limiting, CORS configuration, secure session management
Automated Test Suite: 71+ unit tests to guard against regressions and verify security measures
Result
All identified vulnerabilities remediated — XSS, Command Injection, Input Validation
71+ unit tests as a safety net against regressions
Enterprise-ready: Application prepared for deployment in regulated environments with SCCM/Intune/GPO
Documented security architecture as a foundation for future audits
