Vibe Coding Security Risks: What AI Builders Don't Tell You About RLS and Webhooks
Direct Technical Summary
Vibe coding tools (Lovable, Bolt, Cursor, Replit) optimize for visual completion rather than backend security. Independent security audits reveal that over 73% of vibe-coded applications leave PostgreSQL Row-Level Security (RLS) policies un-enforced and process third-party payment webhooks without cryptographic signature verification, exposing user databases to unauthorized data scraping and payment spoofing attacks.
The Top 4 Security Vulnerabilities in Vibe-Coded Apps
1. Disabled or Misconfigured Row-Level Security (RLS)
When an AI generator scaffolds Supabase tables, it frequently enables RLS but writes permissive policies:
sql
snippet
-- Vulnerable AI-generated policy: allows any authenticated user to read all rows!
CREATE POLICY "Enable read access for all users" ON "public"."orders"
FOR SELECT USING (true);
supabase.from('orders').select('*') to download your entire customer order database and PII.The Fix: Restrict access strictly to the authenticated user UID:
sql
snippet
-- Hardened production policy
CREATE POLICY "Users can only access own orders" ON "public"."orders"
FOR SELECT USING (auth.uid() = user_id);
2. Stripe Webhook Signature Bypass
AI models often generate Stripe webhook handlers that read JSON payloads without verifyingstripe-signature:
typescript
snippet
// VULNERABLE CODE generated by AI tools:
export async function POST(req: Request) {
const body = await req.json();
if (body.type === 'checkout.session.completed') {
await upgradeUserToPro(body.data.object.customer); // Attacker can POST fake payload!
}
}
/api/webhooks/stripe endpoint and unlock lifetime premium access without paying.The Fix: Always verify the cryptographic signature against your Stripe endpoint secret:
typescript
snippet
// Production Hardened Webhook Handler
import Stripe from 'stripe';
import { headers } from 'next/headers';const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!);export async function POST(req: Request) {
const body = await req.text();
const signature = headers().get('stripe-signature')!; let event: Stripe.Event;
try {
event = stripe.webhooks.constructEvent(
body,
signature,
process.env.STRIPE_WEBHOOK_SECRET!
);
} catch (err) {
return new Response('Invalid webhook signature', { status: 400 });
} // Safely process verified event
if (event.type === 'checkout.session.completed') {
const session = event.data.object as Stripe.Checkout.Session;
await upgradeUserToPro(session.client_reference_id);
} return new Response('Success', { status: 200 });
}
3. Client-Side Secret Leakage
AI generators often place private API keys (OpenAI keys, Anthropic keys, Supabase Service Role keys) in files prefixed withNEXT_PUBLIC_, bundling private credentials into client-side JavaScript.---