Bolt App Security Audit
Bolt is remarkable: full-stack apps, generated and running in the browser, in minutes. That speed is exactly why a pre-launch check matters. The whole app came into existence without a single human reading the code that handles your users' data and your payments.
I'm Terry Threatt, a software engineer who has shipped and sold production apps on the stack Bolt generates: Next.js/React, Supabase or Firebase, Stripe. I audit Bolt apps at a fixed price and deliver a report you can act on the same day, with fix prompts you paste straight back into Bolt.
- Fixed price
- No sales call
- Report in days
- Written for founders, not engineers
The failure patterns I see in Bolt apps
Every AI builder has a signature. Bolt's speed-first, everything-in-one-place approach tends to produce a specific set of issues:
API keys hardcoded into frontend code.
Bolt moves fast, and the fastest way to call OpenAI, Stripe, or Supabase is directly from the client, with the key right there in the bundle. Anyone who opens dev tools can lift it, and bots scan for exactly this.
Environment variables that aren't actually secret.
Secrets that belong on the server end up in variables the build inlines into public JavaScript. The .env file itself sometimes lands in the repo, and even if it's deleted later, git history remembers.
No server-side validation.
Bolt builds forms that validate in the browser and endpoints that trust whatever arrives. Malformed payloads, manipulated IDs, and oversized inputs go straight through to your database.
Database rules left at defaults.
Whether it's Supabase RLS or Firebase security rules, generated apps frequently ship with rules that let any authenticated user (sometimes any visitor) read data that belongs to someone else.
No rate limiting on expensive endpoints.
If your app calls an LLM or sends email, one person with a loop can drain your API budget overnight. Generated code almost never includes rate limits.
What the audit covers
This is a manual review by a person who ships on this stack, built around where Bolt apps actually break:
Full secrets sweep.
Repo, git history, and the built client bundle, scanned for live keys, service-role credentials, and anything else that shouldn't be public.
The two-account test.
Two test accounts, and I try to read and change one's data from the other, against your API directly, not through your UI. This finds most critical data-isolation bugs.
API and input review.
Endpoints hit with no session, the wrong session, manipulated IDs, and malformed payloads. Over-fetching checked too: APIs that return whole rows when the UI needs two fields leak emails and internal flags.
Auth enforced on the server.
Protected routes tested directly. Role and admin checks verified server-side, because changing a role field in the browser shouldn't make you an admin.
Billing correctness, if you charge.
Webhook signature verification, cancellation and failed-payment handling, and price integrity: can a user check out at a price you didn't set?
A report you can act on tonight
Findings are ranked by severity and written in business terms: what it is, what it costs you if ignored, and a copy-paste fix prompt written for Bolt. Page one is a go/no-go verdict. You get a 15-minute video walkthrough with the full audit tiers, and seven days of follow-up questions are included.
No meetings, ever. Order, fill out the ten-minute intake form with read-only access, get the report in days.
What it costs
Real prices, published here. No discovery call, no custom quote. You can buy an audit tonight and have your intake form done before bed.
| Package | Price | Turnaround | Best for |
|---|---|---|---|
| Launch Scan | $299 | 48-hour turnaround | “I just want to know if anything is on fire.” |
| Launch Audit | $999 | 5 business days | “Real users are about to trust me with their data.” |
| Launch + Revenue AuditMost popular | $1,900 | 5-7 business days | “This app is supposed to make money. Prove the pipes are connected.” |
| Ship Monitor | $149/month | Ongoing | everyone who just passed an audit and plans to keep building. |
Frequently asked questions
My Bolt app works perfectly. Do I still need an audit?
Working and safe are different properties. Everything on this page (leaked keys, cross-user data access, fake payment events) happens in apps that work flawlessly for the founder who built them. The problems only surface when strangers show up.
Can't Bolt fix its own security issues?
Bolt will happily apply fixes; that's what the fix prompts in my report are for. What it can't reliably do is find its own blind spots. The audit is the outside set of eyes; Bolt is the mechanic that does the repair.
What if my app uses Firebase instead of Supabase?
Covered. The audit adapts to the stack: Firebase security rules get the same line-by-line review and two-account testing that Supabase RLS policies do.
What do you need from me?
About ten minutes: read-only repo access or a zip export, your deployed URL, database read access or screenshots, and permission to create two test accounts. I never take write access, and all access is deleted 30 days after we finish.