Security Issues

Learn how XSS vulnerabilities appear in Lovable-generated React apps and how to fix them before attackers exploit user trust.

Understand which API keys in Lovable apps are safe to expose and which are critical security vulnerabilities needing immediate remediation.

Lovable apps on Supabase frequently ship without Row Level Security. Learn to detect missing RLS and lock down your database before data leaks.

Lovable apps often implement auth incorrectly, relying on client-side checks that attackers easily bypass. Learn how to detect and fix broken auth.

Bolt.new generates full-stack apps from prompts, but the AI-written code often contains XSS vulnerabilities. Learn how to find and fix them.

Bolt.new apps frequently expose secret API keys in frontend code. Learn which keys are safe and which need to be moved to the server immediately.

Bolt.new apps using Supabase frequently deploy without Row Level Security, leaving databases wide open. Learn to detect and fix this critical issue.

Bolt.new generates auth flows that look secure but enforce access only in the UI. Learn how attackers bypass client-side checks and fix them.

Windsurf AI IDE generates code from prompts, but the output frequently contains XSS vulnerabilities. Learn how to detect and fix XSS in Windsurf projects.

Windsurf AI IDE generates integration code that often hardcodes API keys into frontend files. Identify and secure exposed secrets in Windsurf apps.

Windsurf-generated apps typically ship without security headers, leaving them vulnerable to clickjacking, MIME sniffing, and other browser-based attacks.

Windsurf-generated apps implement auth UIs but skip server-side authorization. Learn how attackers bypass client-side auth checks and how to fix it.

Replit makes deployment instant, but apps built in its online IDE often contain XSS vulnerabilities. Learn how XSS appears in Replit projects and how to fix it.

Replit projects frequently leak API keys through public repos, client-side code, and misconfigured Secrets. Learn to detect and fix key exposure in Replit.

Replit-hosted apps typically lack security headers, exposing them to clickjacking, MIME sniffing, and downgrade attacks. Configure proper headers on Replit.

Replit apps frequently implement auth with insecure session handling and missing server-side access control. Detect and fix broken auth in Replit projects.

Firestore databases without Security Rules expose all data to anyone with the public Firebase config. Detect missing rules and lock down your Firestore.

Firebase API keys are public by design, but Admin SDK keys and service account JSON files are critical secrets. Learn the difference and protect real secrets.

Firebase Auth handles sign-in securely, but authorization mistakes in Security Rules and Cloud Functions let users access data they shouldn't. Fix broken auth.

Firebase apps store and retrieve user content from Firestore, creating XSS risks when rendered without sanitization. Secure your Firebase data rendering.

Missing RLS is the most common and critical Supabase vulnerability. Learn how to detect unprotected tables and implement proper security policies.

Understand the difference between Supabase anon keys (safe) and service_role keys (critical). Detect and fix dangerous key exposure in your project.

Supabase Auth handles login securely, but authorization mistakes let users access data they shouldn't. Implement proper access control beyond authentication.

V0 by Vercel generates React components from prompts, but the output can contain XSS vulnerabilities when rendering dynamic content. Fix unsafe patterns.

V0 generates Next.js components that sometimes include placeholder API keys or client-side API call patterns. Prevent secret exposure when integrating V0 output.

V0 generates UI components but not security infrastructure. Next.js apps built with V0 typically lack critical HTTP security headers. Learn how to configure them.

Vercel makes it easy to deploy Next.js apps, but the NEXT_PUBLIC_ prefix silently exposes environment variables to the browser. Secure your secrets on Vercel.

Vercel provides HTTPS and basic protections but does not add security headers by default. Learn how to configure CSP, HSTS, and other headers for Vercel.

Vercel API routes and serverless functions often have permissive CORS settings that allow any origin to make authenticated requests. Detect and fix CORS issues.

Netlify environment variables can end up in client-side bundles through build-time injection. Identify exposed secrets and secure your Netlify deployment.

Netlify sites often lack security headers because the _headers file or netlify.toml config is missing. Add CSP, HSTS, and other security headers to Netlify.

Netlify Functions and _headers files often set overly permissive CORS policies. Detect wildcard CORS and configure proper origin restrictions on Netlify.

Cursor AI helps developers write code faster, but its suggestions can introduce XSS vulnerabilities. Spot and fix unsafe patterns in Cursor output.

Cursor AI can accidentally commit API keys when generating code. Learn how to prevent key exposure in Cursor-assisted development workflows.

Railway makes deployment easy with automatic env variable injection, but misconfigured frontend builds can expose secrets in client bundles. Secure keys.

Railway deployments typically lack security headers because the platform does not inject them automatically. Configure proper headers for Railway.