Lovable BOLA: 48 Days, Five API Calls, Source Code + Database Credentials of Other People's Projects

Introduction

In the fast-evolving world of vibe coding, where developers use AI-powered tools like Lovable to rapidly prototype and deploy applications, a critical security vulnerability has emerged. Over a 48-day period, researchers discovered that a single Broken Object Level Authorization (BOLA) flaw in Lovable's platform allowed attackers to gain access to the source code, database credentials, and environment variables of hundreds of user projects. This article dissects the incident, explains the mechanics of BOLA attacks, and provides actionable guidance for developers to protect their work when using AI coding assistants.

The vulnerability was not a sophisticated zero-day exploit but a classic authorization flaw: the platform failed to verify that a user making an API request had the right to access a specific project. By simply guessing or enumerating project IDs, an attacker could retrieve sensitive data with just five API calls. This case study is a stark reminder that even the most innovative tools can have fundamental security gaps.

The Problem: How Lovable's BOLA Vulnerability Worked

Broken Object Level Authorization (BOLA) is a vulnerability that occurs when an API endpoint exposes object identifiers (like project IDs or user IDs) and fails to check if the requester is authorized to access that specific object. In Lovable's case, the platform used predictable integer-based project IDs, making enumeration trivial.

The Attack Vector in Detail

1. Project ID Enumeration: Lovable assigned sequential numeric IDs to every user project. An attacker could start with project/1 and increment the ID.
2. Missing Authorization Checks: The GET /api/project/{id}/export endpoint returned full project details—including source code, database connection strings, and API keys—without verifying that the requesting user owned or was invited to that project.
3. Minimal Effort, Maximum Damage: With just five HTTP requests (e.g., to project IDs 1001, 1002, 1003, 1004, and 1005), an attacker could harvest complete project data from multiple users.

According to a report by the OWASP Foundation, BOLA consistently ranks as the most common API vulnerability in their Top 10 list, affecting an estimated 65% of tested APIs. The Lovable incident underscores why this risk is so pervasive: developers often focus on functionality over authorization.

The Solution: Mitigation Strategies for Developers

While platform providers like Lovable have since patched this vulnerability, developers using any AI coding tool must adopt defensive practices. Here are concrete steps to prevent similar exposures in your projects.

1. Use UUIDs Instead of Sequential IDs

Sequential numeric IDs make enumeration easy. Switch to universally unique identifiers (UUIDs) for all user-facing objects. A UUID like a1b2c3d4-e5f6-7890-abcd-ef1234567890 is virtually impossible to guess.

Example Implementation (Node.js):

const { v4: uuidv4 } = require('uuid');
const projectId = uuidv4(); // Generates a random UUID

2. Implement Robust Authorization Checks

Every API endpoint that accesses a resource must verify that the authenticated user has permission to access that specific object. This is often called "object-level authorization."

Checklist:
- Validate user identity via JWT or session tokens.
- Compare the user's ID against the owner or collaborator list of the requested resource.
- Return a generic 404 error if authorization fails (don't reveal whether the resource exists).

3. Secure Environment Variables and Credentials

Never expose database credentials, API keys, or secrets in exported source code or API responses. Use a secrets manager like HashiCorp Vault or AWS Secrets Manager, and inject them at runtime.

Bad Practice:

{
  "db_connection": "postgresql://user:password123@db.example.com:5432/prod"
}

Good Practice:

{
  "db_connection": "${DB_CONNECTION_STRING}"
}

Store the actual connection string in environment variables or a secure vault.

4. Rate-Limit API Endpoints

Even with UUIDs, rate limiting can prevent automated enumeration attempts. Implement aggressive rate limits on endpoints that expose sensitive data.

Example with Express.js:

const rateLimit = require('express-rate-limit');
const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100, // limit each IP to 100 requests per windowMs
});
app.use('/api/project', limiter);

5. Conduct Regular Security Audits

Use automated tools like OWASP ZAP or Burp Suite to scan your APIs for BOLA vulnerabilities. Schedule audits after every major release.

Case Study: The 48-Day Window

From the initial discovery to the public disclosure, the vulnerability remained exploitable for 48 days. During this period, an attacker could have accessed:

Real-World Impact: If a project used Stripe for payment processing, the exposed API keys could allow an attacker to make unauthorized charges or access customer data. Similarly, database credentials could lead to data theft or ransomware.

Lovable has since implemented server-side authorization checks and switched to UUID-based project IDs. However, the incident highlights a broader issue: many vibe coding platforms prioritize rapid prototyping over security.

Results and Lessons Learned

Positive Outcomes

• Increased Awareness: The incident prompted many developers to audit their own projects for similar vulnerabilities.
• Platform Improvements: Lovable now requires authentication for all API endpoints and uses randomized identifiers.
• Community Education: Security researchers published detailed write-ups, helping the entire development community learn from the mistake.

Ongoing Risks

• Third-Party Integrations: Even if your code is secure, the platform you build on may have vulnerabilities. Always assume external services can leak your data.
• Human Error: Developers may accidentally commit .env files or include sensitive data in public repositories. Use .gitignore and pre-commit hooks to prevent this.

How to Protect Your Projects on AI Coding Platforms

1. Assume Breach: Design your application as if the platform will be compromised. Use encryption for sensitive data at rest and in transit.
2. Minimize Privileges: Grant only the minimum necessary permissions to API keys and service accounts.
3. Monitor for Anomalies: Set up alerts for unusual API call patterns, such as rapid enumeration attempts.
4. Use a Dedicated Secrets Manager: Do not store secrets in source code. Tools like Doppler or Infisical can inject secrets at runtime.

ASI Biont supports secure integration with various platforms through API connections. For developers looking to build robust applications with proper authorization, ASI Biont offers courses that cover API security best practices—learn more at asibiont.com/courses.

Conclusion

The Lovable BOLA vulnerability is a cautionary tale for the era of AI-assisted development. In just 48 days and with only five API calls, an attacker could compromise the source code and database credentials of multiple projects. The lesson is clear: speed and convenience must never come at the expense of security.

Developers using vibe coding tools should adopt a security-first mindset from the start. Implement UUIDs, enforce object-level authorization, secure credentials, and regularly audit your APIs. By doing so, you can enjoy the productivity gains of AI coding without exposing your projects to unnecessary risk. The future of development is fast, but it must also be secure.