M3 Security Alert: Next.js App Exposed to XSS, Clickjacking, Downgrade Attacks

A critical security gap has been identified in a Next.js application, exposing it to multiple web-based attacks due to the complete absence of essential security headers. The vulnerability, rated MEDIUM (CVSS 5.0), is located in the `next.config.ts` file and leaves the application unprotected against cross-site scripting (XSS), clickjacking, HTTPS downgrades, MIME sniffing, and referrer data leaks.

The missing headers include Content-Security-Policy (CSP) for XSS mitigation, Strict-Transport-Security (HSTS) to prevent protocol downgrade attacks, X-Frame-Options to block clickjacking, X-Content-Type-Options to stop MIME sniffing, and a secure Referrer-Policy. The security report, tagged as finding [M3], has been assigned a remediation priority of THIS WEEK, indicating an urgent need for action to close these exploitable vectors.

Failure to implement the recommended `headers()` configuration in `next.config.ts` leaves the application and its users at sustained risk. This oversight represents a systemic security failure in the deployment pipeline, where standard hardening measures were omitted. The immediate pressure is on the development and security teams to patch this configuration before the exposure window is exploited.