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Every FussyBug evaluation concludes with an uncompromised document. No theoretical speculation, no vague advice. Just explicit vulnerabilities, their precise architecture coordinates, and the exact steps required to resolve them.

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These materials serve as architectural demonstrations of our reporting structure and vulnerability mapping. Entities, code vectors, and telemetry are entirely simulated to uphold absolute client confidentiality.

Deep Audit Gate

Inside the Deep Audit Blueprint: SaaS Booking Platform

A multi-tenant application engineered rapidly with advanced AI tools, preparing for immediate public launch and paying production traffic.

Telemetry
Configuration
Built With
Lovable, Cursor
Stack
Next.js, Supabase, Stripe
Scope
18,400 lines of code
Turnaround
9 business days
Example report · SaaS booking app · Next.js + SupabaseFull security and logic review
3Critical
5High
9Medium
BlockedEvaluation State
IDSeverityLocationFindingRemediation
FB-001CRITICALsupabase/migrations/002.sqlRow-level security is entirely disabled across core bookings databases, allowing any authenticated user token to arbitrarily view or modify independent client tenancies.Enforce strict row-level security and deploy a targeted policy validating rows directly against the user’s authenticated ID.
FB-004CRITICALlib/admin.ts:12An elevated service role key is mistakenly imported into a client-side component, exposing top-tier administrative privileges directly to client browser runtimes.Migrate privileged administrative vectors exclusively to isolated server-side environments and instantly rotate the exposed credentials.
FB-009HIGHpackage.jsonReliance on a completely nonexistent npm package version dependency, exposing the compilation ecosystem to targeted supply-chain hijack vectors.Deprecate the phantom dependency and implement a thoroughly vetted, native date-utility alternative already present in the stack.

Excerpt showing 3 of 17 findings.

Executive Summary

Two critical vectors expose total multi-tenant customer data privacy to arbitrary extraction and modification. Both flaws can be completely resolved within a single engineering cycle. We strongly advise halting production launch operations until FB-001 and FB-004 are thoroughly patched and re-verified.

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Launch Health Check

E-Commerce Storefront

An online destination for custom goods, engineered entirely by a solo founder in two weekends and preparing to accept live customer transactions.

Telemetry
Configuration
Built With
Bolt
Stack
React, Firebase, Stripe
Scope
Checkout workflows, accounts infrastructure, administrative controls
Turnaround
4 business days
Example report · Online store · React + FirebasePre-launch health check
2Critical
2High
3Medium
BlockedEvaluation State
IDSeverityLocationFindingRemediation
FB-101CRITICALfirestore.rulesGlobal structural rules implicitly authorize unrestricted read and write actions across all database collections, exposing private customer addresses and order volumes to the public web.Enforce restrictive isolated data rules limiting data reads exclusively to documented resource owners, and permanently seal administrative vectors.
FB-104CRITICALsrc/pages/Checkout.jsx:88Financial transaction computations are processed directly within the client browser before telemetry is transmitted to Stripe, allowing malicious tampering of product values.Re-architect transaction pricing securely on server-side nodes using strictly mapped product identifiers and verified quantity counts.
FB-107HIGHsrc/pages/Admin.jsxThe administrative interface is hidden from visual navigation menus but completely unprotected at the network routing layer, leaving inventory parameters open to arbitrary editing.Implement hard backend verification requiring an authentic administrative token before executing server-side modifications.
FB-110HIGH.env (Git History)A live Stripe secret production key was committed during initial configuration phases and remains actively retrievable within public repository history logs.Revoke and cycle the compromised Stripe secret immediately, and systematically purge historical repository logs.
FB-113MEDIUMsrc/components/Reviews.jsxClient feedback submissions are accepted and displayed as raw HTML syntax, welcoming dangerous cross-site scripting inputs.Enforce modern sanitization filters or strictly parse user reviews as plain text string assets.

Excerpt showing 5 of 7 findings.

Executive Summary

Critical vulnerabilities allow external actors to arbitrarily manipulate item pricing models and extract public records of private consumer addresses. Resolving these core architectural issues shifts the application to an absolute deployment-ready status. Estimated remediation timeline: one to two engineering days.

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Deep Audit Gate

AI Customer Support Agent

An autonomous customer service agent engineered to interact directly with core business logic, parsing real-time transaction records, processing financial remediation, and managing user profiles.

Telemetry
Configuration
Built With
Claude Code, Cursor
Stack
Python, FastAPI, PostgreSQL
Scope
Agent core, tooling framework, transactional APIs
Turnaround
8 business days
Example report · Support agent with tool access · PythonSecurity and logic review including prompt injection
2Critical
3High
4Medium
BlockedEvaluation State
IDSeverityLocationFindingRemediation
FB-201CRITICALagent/tools/refund.pyThe financial refund tool operates without hard logic ceilings. The agent implicitly trusts contextual claims of executive authority, exposing the treasury to unauthorized manual manipulation through casual social engineering vectors.Enforce strict, deterministic transaction limits and human-in-the-loop approval workflows natively inside the application runtime code rather than delegating security boundaries to the LLM context window.
FB-203CRITICALagent/tools/orders.py:40Order historical telemetry lookups rely on arbitrary email parameters supplied directly by the conversation string, allowing unvetted data access across independent user profiles.Bind historical lookups exclusively to the validated session token generated by the authenticated network handshake, never from conversational message properties.
FB-206HIGHagent/prompts/system.txtSusceptibility to latent context overrides allows embedded text strings to systematically decouple the system prompt layer, forcing the model to leak administrative rules and sensitive structural discounts.Completely isolate administrative assets from untrusted runtime text fields, implement semantic layer filtering, and build an automated conversational threat testing suite.
FB-208HIGHapp/main.pyIngress text telemetry systems archive raw, unmasked primary credit card integers directly to plaintext logging environments when provided by end-users.Deploy programmatic regex-driven masking patterns to sanitize payload parameters prior to serialization, and establish explicit epoch retention rules for logging storage.
FB-211MEDIUMagent/memory.pyConversational contextual cache state is retained globally on multi-user terminal devices, permitting consecutive users on an unauthenticated interface to inherit private analytical traces.Formally clear stateful context graphs on token revocation or user logout triggers.

Excerpt showing 5 of 9 findings.

Executive Summary

The autonomous agent lacks immutable operational boundaries, permitting arbitrary prompt instructions to bypass transactional limits and extract private customer database records. Hard structural rules deployed directly outside the neural model elevate the application to absolute deployment safety. Following remediation, automated evaluation passes spanning 300 threat vectors recorded zero successful exploits.

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Continuous Bug Gate

Fintech Payments API

A comprehensive monthly analysis detailing ongoing protection across the core transactional infrastructure of a financial technology startup, where critical features are built continuously using AI code assistants.

Telemetry
Configuration
Built With
GitHub Copilot, Windsurf
Stack
Node.js, TypeScript, PostgreSQL
Scope
Continuous deployment analysis · 62 pull requests reviewed this month
Plan
Monthly retainer framework
Example report · Payments API · Monthly gate report62 pull requests reviewed · 4 blocked before merge
1Critical
2High
5Medium
4Intercepted Before Merge
PassedEvaluation State
IDSeverityLocationFindingRemediation
FB-PR-412CRITICALsrc/routes/transfers.ts:118A newly deployed balance transfer architecture entirely skipped liquidity validation routines when payload parameters were submitted as string types. Intercepted and blocked prior to production deployment.Enforce rigorous mathematical transformation layers and runtime schema validation boundaries prior to triggering downstream transactional code.
FB-PR-427HIGHsrc/jobs/reconcile.tsLatent retry handlers lacked state tracking, introducing structural double-processing vulnerabilities if ledger reconciliation tasks experienced network latency timeouts.Implement native, deterministic idempotency keys across all transactional pipelines and build strict verification checks prior to data mutation.
FB-PR-433HIGHsrc/middleware/auth.tsAn automated AI codebase refactor accidentally stripped verification routines checking API token longevity parameters. Intercepted and blocked prior to production deployment.Restore token expiration verification logic and deploy a permanent regression testing suite to safeguard authentication layers.
FB-PR-441MEDIUMsrc/utils/logger.tsIngress request payloads, including raw, unencrypted account identifiers, were being written natively to system logs.Introduce a unified redaction engine to automatically scrub sensitive financial identifiers from telemetry logs.
FB-PR-450MEDIUMpackage.jsonIntroduction of three distinct third-party modules with documented, active vulnerability listings over the course of the billing cycle.Bump dependencies exclusively to the patched distributions explicitly cataloged within our comprehensive report appendix.

Excerpt showing 5 of 8 findings.

Executive Summary

Continuous intervention successfully trapped all critical and high-severity architectural threats before codebase mutation reached live environments. The underlying risk trajectory continues to improve month-over-month. Because data trends reveal that the most severe regressions stemmed from AI-assisted legacy code modifications, we have developed and deployed two specialized scanning algorithms targeting these distinct behavior patterns.

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AI Code Rescue

Marketplace Data Leak Response

An emergency crisis intervention executed for a two-sided digital marketplace following active user reports of cross-account conversational exposure and merchant telemetry leakage.

Telemetry
Configuration
Built With
Replit Agent
Stack
Express, MongoDB
Scope
Immediate incident triage, threat surface mapping, accelerated remediation strategy
Response
Active operational containment initiated within 24 hours
Example report · Marketplace · Emergency responseRoot cause, fix plan and verification
3Critical
1High
2Medium
StabilizedEvaluation State
IDSeverityLocationFindingRemediation
FB-301CRITICALroutes/messages.js:22Chat payload queries are executed purely via plain numerical conversation identifiers devoid of multi-tenant ownership verification, allowing arbitrary cross-account dialogue exposure through basic incremental enumeration vectors.Enforce cryptographic authorization checks natively on every ingress connection request, and transition primary parameters to non-enumerable, randomized identifiers.
FB-302CRITICALroutes/payouts.js:57The merchant balance routing engine implicitly maps global merchant telemetry to any active authenticated session token, compromising administrative banking data.Strictly constrain endpoint resolution to return exclusively the data bound to the verified session identity, and programmatically mask all merchant banking integers.
FB-303CRITICALserver.jsThe core database layer is directly exposed to the public internet using generic out-of-the-box authentication credentials.Restrict core database exposure exclusively to isolated virtual network layers, forcefully rotate all root credentials, and enforce modern cryptographic handshakes.
FB-305HIGHroutes/auth.jsIdentity recovery tokens are generated without lifecycle boundaries and transmitted across unencrypted plaintext hyperlinks that are cached directly within accessible platform logs.Transition identity recovery models to use single-use, tightly bounded epoch lifecycles, and programmatically scrub recovery strings from server telemetry logs.
FB-307MEDIUMPlatform-wideThe system operates without volumetric threat detection or anomaly triggers, allowing malicious bulk data extractions to go undetected for weeks.Implement automated audit logging matrices alongside real-time anomaly alerts configured to trigger on anomalous mass data reads.

Excerpt showing 5 of 6 findings.

Executive Summary

Forensic tracking successfully isolated the active compromise vector to two omitted tenancy authorization handshakes and an unshielded data architecture layer. Our specialized emergency intervention blueprint was deployed and verified by your core engineering group within 48 hours, fully securing the perimeter. To assist leadership with regulatory compliance obligations, we have provided a precise, factual historical incident digest to guide affected end-user communications.

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