Launch Ready cyber security Checklist for AI-built SaaS app: Ready for security review in bootstrapped SaaS?.

What "ready" means for an AI-built SaaS app

For a bootstrapped SaaS, "ready" does not mean perfect. It means I can put the app in front of real users without exposing secrets, breaking email deliverability, or creating avoidable downtime on day one.

For this specific outcome, I would define ready as:

• No exposed API keys, private tokens, or admin credentials in the repo, logs, client bundle, or deployment history.
• Production domain resolves correctly over HTTPS with valid SSL and clean redirects.
• SPF, DKIM, and DMARC are passing so onboarding and billing emails do not land in spam.
• Cloudflare or equivalent edge protection is active with basic DDoS and caching rules.
• Environment variables are separated from code and only the minimum needed secrets are in production.
• Monitoring exists for uptime and core error paths, so failures are visible within minutes, not after customers complain.
• No critical auth bypasses, no public admin routes, no open CORS policy that allows random sites to read private data.
• p95 API latency is under 500ms for the main user journey, or at least measured if you are still pre-scale.
• The deployment path is repeatable, documented, and reversible.

If you cannot say "yes" to most of those points, you are not security review ready. You are still in prototype mode.

It is designed for bootstrapped SaaS teams that need a production-safe baseline before spending on ads, onboarding users, or asking for a security review.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | HTTPS everywhere | All app routes redirect to HTTPS with valid certs | Prevents interception and trust issues | Login theft, browser warnings, failed reviews | | Secrets removed from code | Zero keys in repo, client bundle, logs | Stops credential leaks | Data exposure, account takeover | | Auth protected routes | Admin and private routes require auth + role checks | Prevents unauthorized access | Full data breach | | CORS locked down | Only approved origins allowed | Stops cross-site data reads | Token theft, API abuse | | Email auth passes | SPF/DKIM/DMARC all pass | Keeps emails out of spam | Failed onboarding and billing comms | | Cloudflare enabled | WAF/DDoS/caching rules active | Reduces attack surface and load | Outages during traffic spikes | | Env vars separated | Prod secrets live only in server env vars | Limits accidental leakage | Public key exposure | | Monitoring active | Uptime + error alerts configured | Speeds incident response | Silent downtime | | Redirects correct | Root domain and subdomains resolve as intended | Avoids SEO and auth confusion | Broken links and duplicate content | | Deployment repeatable | One documented deploy path with rollback plan | Reduces human error during release | Bad releases stay live longer |

The Checks I Would Run First

1. Secret exposure check

Signal: I look for API keys in Git history, environment files committed by mistake, frontend bundles containing server secrets, and logs that print tokens or session IDs.

Tool or method: I scan the repo with secret detection tools like Gitleaks or TruffleHog, then inspect build artifacts and recent logs. I also grep for common key patterns like `sk_`, `pk_`, `Bearer`, `PRIVATE_KEY`, and provider-specific prefixes.

Fix path: Remove exposed secrets immediately, rotate every compromised key, purge them from history where possible, then move all sensitive values into server-side environment variables. If a secret reached a browser bundle once, I treat it as compromised.

2. Authentication and authorization check

Signal: I test whether private endpoints can be reached without login, whether user A can access user B's records by changing an ID, and whether admin-only actions are blocked for normal users.

Tool or method: I use manual testing plus API clients like Postman or Insomnia. For deeper review I inspect middleware guards and backend route handlers directly.

Fix path: Add server-side authorization checks on every sensitive route. Do not rely on frontend hiding buttons. If you have multi-tenant data, enforce tenant scoping at query level too.

3. CORS and browser trust boundary check

Signal: I check if the API returns `Access-Control-Allow-Origin: *` while also allowing credentials or sensitive endpoints.

Tool or method: I inspect response headers from the browser devtools and run targeted requests from an unrelated origin. This catches apps that "work" but expose data cross-site.

Fix path: Lock CORS to known production origins only. If you need multiple domains for app and marketing site use explicit allowlists. Never combine wildcard origins with cookies or auth headers.

4. Email deliverability check

Signal: Signup emails fail SPF/DKIM/DMARC alignment tests or land in spam folders at major providers like Gmail and Outlook.

Tool or method: I verify DNS records in Cloudflare or your registrar panel and test messages through Mail-tester or similar inbox placement checks.

Fix path: Publish correct SPF records for your mail provider only once per domain. Add DKIM signing through your provider. Set DMARC to at least `p=none` initially if you are unsure about enforcement.

v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s

5. Deployment and SSL chain check

Signal: The app serves mixed content, redirects loop between HTTP and HTTPS, or subdomains fail certificate validation.

Tool or method: I test root domain, `www`, app subdomain(s), login callback URLs, webhook endpoints, and any marketing pages using browser checks plus SSL verification tools.

Fix path: Standardize canonical domains first. Then configure redirects once at the edge layer so both users and crawlers land on one version of each URL. Reissue certs if needed rather than layering temporary hacks on top of broken routing.

6. Monitoring and incident visibility check

Signal: You cannot tell when the app goes down unless a customer reports it. There is no alerting for 500 errors or failed background jobs.

Tool or method: I review uptime monitors plus application logs for error rates by route. If possible I add synthetic checks against login/signup/payment flows so alerts fire before revenue drops.

Fix path: Set up uptime monitoring on the homepage plus one authenticated health endpoint. Add alerting to email or Slack. Track p95 latency under 500ms on core endpoints if your stack is simple enough to support it today.

Red Flags That Need a Senior Engineer

1. You have shipped with `.env` files in the repo more than once. That usually means there is no reliable release process yet. The risk is not just one leak; it is repeated leakage across branches and deployments.

2. Your backend trusts client-supplied IDs for access control. This creates easy tenant breakout bugs. A founder cannot safely patch that by guessing which lines matter most.

3. You use third-party AI features that can call tools or fetch external content. That opens prompt injection risk plus data exfiltration risk if outputs are not constrained properly.

4. Your email setup uses multiple providers with overlapping DNS records. This often breaks SPF alignment silently and causes signup emails to disappear into spam while support tickets pile up.

5. You do not know which environment is production. If staging credentials can hit live data or vice versa, one bad deploy can cause downtime plus customer data loss fast enough to damage trust permanently.

DIY Fixes You Can Do Today

1. Rotate every secret you can find. Start with payment keys, email provider keys, database passwords, OAuth client secrets, webhook secrets, then anything used by CI/CD.

2. Turn on 2FA everywhere. Use it on GitHub/GitLab/Bitbucket hosting accounts plus Cloudflare plus your registrar plus email provider accounts first.

3. Lock down your DNS basics. Make sure the apex domain points where it should go, `www` redirects correctly if used as canonical form means one source of truth exists for search engines too.

4. Review public routes manually. Open an incognito window and test signup/login/logout/reset password/admin pages as an unauthenticated user before customers do it for you.

5. Add one uptime monitor now. Even a basic monitor on your homepage plus one health endpoint gives you early warning instead of learning about outages from angry users on social media.

Where Cyprian Takes Over

When these checks fail repeatedly across codebase setup DNS email delivery deployment edge security and observability Launch Ready is the faster path than piecing together fixes yourself across weekends.

Here is how I map failures to deliverables:

| Failure area | Launch Ready deliverable | Timeline | |---|---|---| | Domain misconfigurations | DNS setup redirects subdomains canonical routing | Hour 1 to 8 | | Broken SSL / mixed content | SSL issuance HTTPS enforcement edge redirect rules | Hour 1 to 8 | | Weak edge protection | Cloudflare setup caching DDoS protection WAF baseline rules | Hour 4 to 16 | | Email failing spam checks | SPF DKIM DMARC configuration validation testing | Hour 4 to 16 | | Secrets leaking into codebase history | Environment variable cleanup secret handling handover checklist | Hour 8 to 24 | | Unclear deployment process | Production deployment hardening rollback notes release steps | Hour 12 to 32 | | No visibility into outages | Uptime monitoring alert routing incident checklist handoff docs | Hour 24 to 48 |

My recommendation is simple: do not spend days polishing features while your launch surface is unsafe. Fix the foundation first because broken email broken auth or leaked secrets will cost more than the sprint itself in lost signups support load and reputation damage.

References

• roadmap.sh - API Security Best Practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh - Cyber Security Roadmap: https://roadmap.sh/cyber-security
• OWASP Top 10: https://owasp.org/www-project-top-ten/
• Cloudflare Docs - DNS records overview: https://developers.cloudflare.com/dns/manage-dns-records/
• Google Workspace - SPF DKIM DMARC basics: https://support.google.com/a/topic/2752442

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*