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BSEC-VAPT-0417
Authenticated tenant user accessed and downloaded billing ledgers belonging to 41 other enterprise tenants by manipulating numeric object IDs in the URL path.
Attack Path
- Attacker authenticates with valid credentials as Tenant A.
- Replaces {tenantId} and {id} with arbitrary target identifier in GET request.
- Backend API fails to enforce tenancy isolation in SQL query execution.
- Full sensitive financial PDF dossiers retrieved without authorization.
Root Cause
Controller invoked findById() directly on user-supplied parameter without cryptographic tenancy binding against the verified session claims.
Vulnerable
def fetch_invoice(invoice_id):
return db.query(Invoice).filter(
Invoice.id == invoice_id
).first()Verified Patch
def fetch_invoice(invoice_id, session_user):
return db.query(Invoice).filter(
Invoice.id == invoice_id,
Invoice.tenant_id == session_user.tenant_id
).first()Covered Target Architectures
- Web Applications (React/Next.js/Angular/Vue)
- REST, GraphQL & gRPC APIs
- iOS Swift/Objective-C Apps
- Android Kotlin/Java Apps
- Internal & External Network Infrastructure
- Thick Client Executables
✓ 100% Manual Exploit Rigor
Every test is conducted manually by senior security architects. Zero automated scanner dumps and zero false positives.
✓ 24-Hour Scoping Turnaround
Receive a precise, fixed-price statement of work (SOW) and testing schedule within 24 hours of technical scoping.
✓ Drop-In Code Remediation
Every identified vulnerability includes tested drop-in code patches in Python, TypeScript, Go, Java, or Terraform.
✓ 90-Day Free Retest Warranty
Complimentary retesting of all patched vulnerabilities within 90 days, followed by a CPA-accepted Letter of Attestation.