We Scanned 500 Lovable Apps. Here's What We Found.

Over the past three months, we ran ClearAudit's full 120+ check security scan against 500 publicly deployed Lovable applications. These were real apps -- SaaS products, landing pages, internal tools, and marketplaces -- built by indie founders, freelancers, and small teams.

The results were sobering: 98% had at least one security vulnerability. 73% had three or more. And the most common issues weren't obscure edge cases -- they were fundamental security gaps that any attacker with basic tools could exploit.

This isn't an attack on Lovable. It's one of the best AI development platforms available. But like every AI coding tool, it optimizes for getting your app working, not for getting your app secure. Those are two very different things.

Here's exactly what we found, why it matters, and how to fix each issue.

Missing Security Headers: The #1 Vulnerability

Found in 94% of scanned apps.

Security headers are HTTP response headers that tell browsers how to behave when handling your site's content. Without them, your app is vulnerable to cross-site scripting (XSS), clickjacking, MIME sniffing attacks, and data exfiltration.

The most commonly missing headers across Lovable apps:

• Content-Security-Policy (CSP): Missing in 91% of apps. Without CSP, an attacker who finds any XSS vulnerability can inject scripts that steal user data, redirect payments, or hijack sessions. CSP tells the browser exactly which scripts, styles, and resources are allowed to load.

• X-Frame-Options: Missing in 87% of apps. Without this header, your app can be embedded in an invisible iframe on an attacker's site, enabling clickjacking attacks where users think they're clicking buttons on your app but are actually performing actions on the attacker's page.

• Strict-Transport-Security (HSTS): Missing in 82% of apps. Without HSTS, a user's first visit to your site could be intercepted over HTTP before the redirect to HTTPS happens. This is called an SSL stripping attack.

• Permissions-Policy: Missing in 89% of apps. This header controls which browser features (camera, microphone, geolocation) your app can access. Without it, injected scripts could silently access the user's camera or microphone.

How ClearAudit Helps Fix This

When ClearAudit detects missing security headers, the AI fix prompt generates the exact configuration you need. For a Lovable app deployed on Lovable's hosting, the fix prompt tells your AI tool how to add headers via a _headers file or through your deployment configuration. You paste the prompt into Cursor, Claude, or Lovable's chat, and the headers are configured in seconds.

Exposed Supabase Anon Keys: A Ticking Time Bomb

Found in 76% of scanned apps.

Every Lovable app that uses a database runs on Supabase. The Supabase "anon key" is a public API key that lives in your frontend JavaScript bundle. This is by design -- the anon key is meant to be public.

But here's where it gets dangerous: the anon key only works safely when Row Level Security (RLS) policies are properly configured. Without RLS, anyone who views your page source can grab the anon key and use it to:

• Read every row in every table in your database
• Insert arbitrary data
• Modify or delete existing records
• Access other users' private data

We found that 76% of the apps we scanned had their anon key exposed with either no RLS policies or incomplete RLS policies. In many cases, we could query the database directly from the browser console and pull back user emails, profile data, and application records.

The Fix

This isn't a quick header change -- it requires understanding your data model and implementing proper RLS policies for every table. ClearAudit's fix prompt walks you through:

1. Which tables are currently unprotected
2. Example RLS policies for common patterns (user-owns-data, public-read, admin-only)
3. How to test that your policies work correctly
4. How to move sensitive operations to server-side Edge Functions

For a deeper dive on this topic, read our full guide: Your Supabase App Is Leaking Data.

Missing Email Authentication Records (SPF/DKIM/DMARC)

Found in 68% of scanned apps.

If your app sends emails -- welcome messages, password resets, notifications -- and you haven't configured SPF, DKIM, and DMARC records, attackers can send emails that appear to come from your domain. This is called email spoofing, and it's embarrassingly easy to do.

• SPF (Sender Policy Framework): Tells receiving email servers which IP addresses are authorized to send email on behalf of your domain.
• DKIM (DomainKeys Identified Mail): Adds a cryptographic signature to your emails so recipients can verify the email wasn't tampered with in transit.
• DMARC (Domain-based Message Authentication, Reporting & Conformance): Tells receiving servers what to do with emails that fail SPF/DKIM checks (quarantine, reject, or allow).

Without these records, a scammer can send phishing emails from your domain to your users. "Hi, we noticed suspicious activity on your account. Click here to verify your identity." The email passes basic checks because there's no SPF/DKIM/DMARC to fail.

The Fix

ClearAudit checks your domain's DNS records and generates the exact TXT records you need to add. The fix prompt includes specific SPF, DKIM, and DMARC records tailored to your email provider (Resend, SendGrid, Supabase Auth, etc.).

No Rate Limiting on Authentication Endpoints

Found in 61% of scanned apps.

Most Lovable apps use Supabase Auth for login and signup. While Supabase has some built-in rate limiting, many apps expose additional authentication-related endpoints (password reset, magic link requests, OTP verification) without any rate limiting.

This means an attacker can:

• Brute-force passwords by trying thousands of combinations per minute
• Flood password reset endpoints to spam users' inboxes
• Overwhelm your Supabase project's auth limits, causing legitimate users to be locked out
• Enumerate valid email addresses by observing different error responses for existing vs. non-existing accounts

The Fix

ClearAudit's fix prompt includes specific configurations for adding rate limiting to your authentication endpoints, including how to implement rate limiting at the Edge Function level or through Supabase's built-in configuration.

Missing Privacy Policy and Cookie Consent

Found in 58% of scanned apps.

If your app collects any user data -- even just an email address for login -- you likely need a privacy policy. If you use analytics, tracking pixels, or any third-party scripts that set cookies, you need cookie consent.

This isn't just a legal nicety. Under GDPR, fines for missing privacy disclosures can reach 4% of annual revenue. Under CCPA, consumers can sue for $100-$750 per violation. And beyond the legal risk, a missing privacy policy signals to users that you haven't thought about data protection, which erodes the trust you need to convert visitors into customers.

The Fix

ClearAudit flags missing privacy policies and cookie consent mechanisms. The fix prompt helps your AI tool generate a privacy policy template tailored to your app's data collection practices.

CORS Misconfigurations

Found in 43% of scanned apps.

Cross-Origin Resource Sharing (CORS) controls which domains can make requests to your API. A misconfigured CORS policy -- especially one that allows * (any origin) -- means any website can make authenticated requests to your API on behalf of your users.

In the worst case, an attacker creates a malicious webpage that silently makes API calls to your app using the victim's cookies or auth tokens. The attacker's page reads the responses, exfiltrating user data without the user knowing anything happened.

The Fix

ClearAudit identifies overly permissive CORS configurations and generates specific allow-list configurations for your deployment setup.

What Does This Mean for Lovable Developers?

These aren't Lovable-specific problems. We see the same patterns in apps built with Cursor, Claude Code, Bolt, and every other AI coding tool. The root cause is the same: AI tools generate functional code, not secure code.

The good news is that every vulnerability listed above is fixable. Most of them take less than 10 minutes to fix once you know what to do. That's why we built ClearAudit -- to bridge the gap between "my app works" and "my app is secure."

How ClearAudit's AI Fix Prompt Works

Here's what happens when you scan your app with ClearAudit:

1. We run 120+ security checks across headers, SSL/TLS, DNS, authentication, API exposure, privacy compliance, and more.
2. We run 40+ SEO checks covering meta tags, structured data, performance, and crawlability.
3. We generate a detailed report showing every vulnerability found, categorized by severity.
4. We generate an AI fix prompt -- a single, comprehensive prompt you paste into your AI coding tool that tells it exactly what to fix and how.

The AI fix prompt isn't generic advice. It's specific to your app, referencing the exact headers that are missing, the exact DNS records that need to be added, and the exact configurations that need to change. Your AI tool reads the prompt and implements the fixes.

After implementing the fixes, you can run ClearAudit again to see your before-and-after scores. Most apps go from a D or F grade to an A or B in under an hour.

Scan Your Lovable App Right Now

If you've built an app with Lovable, there's a 98% chance it has security vulnerabilities. The question isn't whether you have issues -- it's how many and how severe.

ClearAudit's free scan takes about 2 minutes and checks 120+ security items. No login required. No credit card. You'll get a complete report showing exactly what needs to be fixed.

Don't wait for a user to find your vulnerabilities before you do.

How secure is your app? Get your free security report -- ClearAudit runs 120+ security checks and 40+ SEO checks in about 2 minutes. No login. No credit card. Get Your Free Report

Related reading

• How to Check If a Website Is Safe: The Complete Guide for 2026 — With AI-generated phishing sites on the rise, knowing how to verify a website's safety is critical. Here's every method — from quick visual checks to professional-grade scanning.
• React Security Best Practices: How to Secure Your React App in 2026 — React prevents some attacks by default, but leaves many security decisions up to you. Here are the 10 vulnerabilities we find in 98% of React apps — and how to fix every one.
• We Found 22 Blog Posts Invisible to Google. One Line of HTML Was Hiding Them All. — A single misconfigured canonical tag made our entire blog invisible to search engines. We built 22 new SEO checks into ClearAudit so this never happens to you.