🔐 SECURITY: Critical Configuration Vulnerabilities Exposed in Next.js Application

A critical security audit of a Next.js application's configuration has revealed multiple, severe vulnerabilities that leave the system exposed. The primary issue is an overly permissive image configuration that allows loading from any remote hostname, effectively opening a door for malicious content injection. This is compounded by a complete absence of essential security headers like Content Security Policy (CSP) and HTTP Strict Transport Security (HSTS), leaving the application defenseless against common web attacks.

The technical breakdown shows a dangerously lax setup. In the `next.config.ts` file, the `images.remotePatterns` setting uses a wildcard (`hostname: '**'`), permitting images from any HTTPS source without restriction. Furthermore, the ESLint configuration lacks security-focused linting rules, and there are no runtime checks to validate the application's environment, relying on insecure defaults not optimized for a production setting.

These oversights create a significant attack surface. The missing CSP header alone prevents control over which resources the browser can load, a fundamental defense against cross-site scripting (XSS). The lack of HSTS exposes the application to protocol downgrade attacks. Together, these configuration flaws represent a systemic failure in production hardening, posing a direct risk to data integrity and user security until the required fixes—restricting image sources to trusted domains and implementing a full suite of security headers—are deployed.