Secure Code Recommender System
Inspect vulnerable backend code, diagnose OWASP & BOLA logic flaws, and receive instant hardened code patches, line-by-line diffs, and regression unit tests.
Select Vulnerability Scenario or Paste Your Code
Choose from 7 critical OWASP/API attack patterns or paste your own backend function into the editor.
Assessed Risk
CWE Classification
CWE-639
OWASP Standard
OWASP API1:2023
Audit Documentation
Export Patch Report
// ✅ SECURE: Hardened with dual-predicate tenant authorization
app.get('/api/invoices/:id', authenticateToken, async (req, res) => {
const { id } = req.params;
const userOrgId = req.user.organizationId; // Bound from verified session
// Enforces cryptographic ownership at the database query boundary
const invoice = await prisma.invoice.findFirst({
where: {
id: id,
organizationId: userOrgId // Strictly scoped to current tenant
}
});
if (!invoice) {
// Return 404 to avoid leaking whether another tenant's record exists
return res.status(404).json({ error: "Invoice not found or access denied" });
}
return res.json({ invoice });
});Key Security Refactor Diffs
Specific lines modified to eliminate the vulnerability and enforce defense-in-depth:
- - Removed: `prisma.invoice.findUnique({ where: { id } })` which leaked cross-tenant records.
- + Added: `prisma.invoice.findFirst({ where: { id, organizationId: req.user.organizationId } })`.
- + Standardized 404 error response to prevent ID enumeration oracle attacks.
Root Cause & Exploitation PoC
Relying purely on user identity authentication (e.g., verifying a valid JWT) without performing resource-level multi-tenant ownership checks in the database query layer.
Audit & Compliance Mapping
Security frameworks and audit criteria impacted by this vulnerability:
Complete unauthorized data exfiltration across organizational boundaries, violating multi-tenant isolation, GDPR, SOC 2 CC6.1, and HIPAA.
Automated CI/CD Regression Test Snippet
// Regression Test (Jest / Supertest)
describe('GET /api/invoices/:id Authorization Boundary', () => {
it('should reject access to another tenant invoice with 404/403', async () => {
const attackerToken = generateAuthToken({ userId: 'u_attacker', orgId: 'org_evil' });
const victimInvoiceId = 'inv_victim_9918';
const response = await request(app)
.get(`/api/invoices/${victimInvoiceId}`)
.set('Authorization', `Bearer ${attackerToken}`);
expect(response.status).toBe(404);
expect(response.body.invoice).toBeUndefined();
});
});Static Code Tools Miss Complex Business Logic Flaws
While our code recommender helps you fix syntax and authorization patterns locally, attackers target multi-step workflow logic, race conditions in state machines, and cross-tenant API chaining that only certified human practitioners can uncover.
Frequently Asked Questions
Is my code snippet transmitted to any server or LLM API?
No. The TrustLayerLabs Secure Code Recommender runs 100% in your local browser sandbox using client-side heuristic parsers. Your proprietary code and tokens are never uploaded or saved to remote servers.
Can automated code recommenders replace a penetration test?
No. Automated tools check for known static syntax rules (e.g., parameter binding or missing algorithms). However, real-world breaches target multi-step business logic flaws, role elevation, and tenant isolation escapes that require offensive human practitioners.
Which programming languages are supported?
Our templates and analysis heuristics support Node.js / TypeScript (Express, Nest, Next.js), Python (FastAPI, Flask, Django), and Go (Gin, GORM, Fiber), with cross-language AST patterns for Java and PHP.
How do I get a full manual audit report for my platform?
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