Launch Ready cyber security Checklist for subscription dashboard: Ready for app review in marketplace products?.

What "ready" means for a subscription dashboard in marketplace app review

For a subscription dashboard, "ready" does not mean "it works on my machine." It means the app review team can create an account, understand the pricing model, complete the subscription flow, and verify that customer data, billing, and access control are protected.

For marketplace products, I would call it ready only if these are true:

• No exposed secrets in code, logs, or client-side bundles.
• Authentication is required for any customer data or subscription state.
• Subscription access cannot be bypassed by changing a URL, request body, or frontend state.
• Email delivery is verified with SPF, DKIM, and DMARC passing.
• The production domain uses HTTPS with valid SSL and safe redirects.
• Cloudflare or equivalent protection is in place for basic DDoS and bot filtering.
• Uptime monitoring is active so you know about outages before reviewers do.
• The app review path is stable on desktop and mobile, with no broken onboarding or empty states.

If any of those fail, review delays are likely. In practice, that means rejected submissions, support tickets from confused users, failed login attempts during review, and wasted ad spend sending traffic to a product that is not safe to publish.

My Launch Ready sprint is built for this exact gap.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | HTTPS everywhere | All pages load over TLS 1.2+ with no mixed content | Protects login and billing traffic | Browser warnings, failed trust checks | | Secret hygiene | Zero secrets in frontend code or public repo | Prevents account takeover and API abuse | Credential leakage, billing fraud | | Auth enforcement | All dashboard routes require valid session | Blocks unauthorized access to subscriptions | Data exposure, review rejection | | Role checks | Admin actions require server-side authorization | Stops privilege escalation | Users edit plans or view other accounts | | Email auth | SPF, DKIM, DMARC all pass | Improves deliverability and trust | Password reset emails land in spam | | DNS correctness | Root domain and subdomains resolve correctly | Reviewers need stable access paths | Broken login links and redirect loops | | Redirect safety | HTTP to HTTPS and non-www to canonical domain work once only | Avoids SEO loss and browser warnings | Infinite loops or duplicate content | | WAF/CDN protection | Cloudflare enabled with basic rate limits | Reduces bot abuse and DDoS noise | Outages during review traffic spikes | | Monitoring live | Uptime alerts fire within 5 minutes of failure | Shortens incident response time | You find outages too late | | Performance baseline | Login and dashboard p95 API under 500ms; LCP under 2.5s on key pages | Reviewers judge speed as quality | Slow onboarding and lower conversion |

The Checks I Would Run First

1. Authentication must protect every subscription route

Signal: I can open any dashboard page without a valid session token or signed-in user. That is an immediate stop.

Tool or method: I test private routes in the browser, then replay requests with curl or Postman after deleting cookies and local storage. I also check server middleware instead of trusting frontend route guards.

Fix path: Put auth enforcement at the server edge first. Then add route guards in the UI for usability only. If your app uses Supabase, Clerk, Firebase Auth, NextAuth, or custom JWTs, I verify that expired tokens fail cleanly with a 401 and do not expose partial data.

2. Secrets must never reach the client bundle

Signal: API keys appear in browser dev tools, source maps, build output, public Git history, or logs. One exposed secret is enough to create billing abuse or data leakage.

Tool or method: I scan environment variables usage across the repo and search built assets for known secret patterns. I also check logging middleware because many teams leak tokens through error traces.

Fix path: Move secrets to server-only env vars immediately. Rotate anything already exposed. Then strip them from CI logs and set up a pre-deploy secret scan so the same mistake does not return next week.

3. Subscription access must be enforced on the backend

Signal: A user can change a plan ID in a request body or local state and unlock premium access without paying. This is common in AI-built apps because frontend state feels like logic when it is only display.

Tool or method: I test plan upgrades by editing network requests directly. I also check whether entitlement comes from signed server records instead of client flags like `isPro=true`.

Fix path: Store subscription status server-side as source of truth. Validate webhook events from Stripe or your payment provider before changing entitlements. Never trust client-submitted plan names for access control.

4. DNS and SSL must be boring

Signal: The root domain resolves but subdomains fail, redirects loop between www and non-www versions, or SSL shows mismatch errors on some paths.

Tool or method: I inspect DNS records at the registrar and Cloudflare. Then I test HTTP to HTTPS redirects from root domain to canonical domain using curl headers rather than guessing from the browser bar.

Fix path: Set one canonical host and one redirect rule only. Add wildcard subdomains only if you actually use them. Make sure certificate issuance covers every active hostname before launch day.

5. Email authentication has to pass before review

Signal: Password reset emails land in spam or never arrive at all. Reviewers often hit this first because they need account verification to continue testing.

Tool or method: I check SPF/DKIM/DMARC alignment using mail tester tools and live test messages from your production domain. If your provider supports it, I confirm bounce handling too.

Fix path: Publish correct DNS records for your email provider. Start DMARC in monitor mode if needed, then move toward quarantine once delivery is stable. Do not launch with unauthenticated transactional email.

6. Monitoring must catch failures before customers do

Signal: You only know about downtime when someone posts on social media or sends a support message hours later.

Tool or method: I verify uptime probes against login page health endpoints and critical API routes. I also make sure alerts go somewhere real like Slack,email,sms,and not just an ignored inbox.

Fix path: Add synthetic checks for homepage load,sign-in,and checkout/subscription verification flows. Set alert thresholds around 5 minutes of downtime max before escalation.

Red Flags That Need a Senior Engineer

• You have no idea where secrets are stored because they were added by AI-generated code across multiple files.
• Subscription access depends on frontend state only.
• Reviewers will need email verification,but transactional email has not been tested from production.
• The app uses multiple domains,but nobody knows which one is canonical.
• You already shipped once,and support tickets show login failures,billing confusion,and random 403 errors.

These are not cosmetic issues. They are launch blockers because they create rejected reviews,data exposure risk,and expensive support load after release.

If two or more of these are true,I would not keep patching blindly. I would pay for a focused rescue sprint instead of spending three days guessing at infrastructure problems that should take one senior engineer a few hours to fix properly.

DIY Fixes You Can Do Today

1. Check every `.env` value against your frontend bundle.

• If anything sensitive appears in shipped JavaScript,it needs to move server-side now.

2. Verify SPF,DKIM,and DMARC on your sending domain.

• Send yourself a password reset email from production and confirm it lands inboxed,in under 60 seconds.

3. Test private routes while signed out.

• If you can still see customer data,you have an auth bug,no matter how good the UI looks.

4. Confirm one canonical domain.

• Pick either `www` or apex as primary,and make every other version redirect once only over HTTPS.

5. Turn on basic monitoring today.

• Even free uptime checks are better than nothing if they alert you when login,sign-up,and API endpoints fail.

A simple DMARC example looks like this:

v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s

That record alone does not solve deliverability,but it gives you visibility into spoofing attempts and misconfigured mail streams.

Where Cyprian Takes Over

If your checklist failure falls into one of these buckets,I handle it inside Launch Ready:

| Failure area | What I fix | Timeline | |---|---|---| | Domain chaos | DNS records,cname setup,www/apex redirects,cross-subdomain routing | Hours 1-8 | | SSL problems | Certificate setup,mixed content cleanup,canonical HTTPS enforcement | Hours 1-8 | | Email issues | SPF,DKIM.DMARC configuration,test sends,bounce checks | Hours 4-12 | | Deployment risk | Production deploy,handoff checks,restart safety,basic rollback plan | Hours 8-24 | | Secret exposure | Env var cleanup,secrets rotation,bad logging removal,repo audit | Hours 8-24 | | Security gaps around auth/subscriptions | Server-side auth checks,simple authorization fixes,replay testing of critical flows | Hours 12-32 | | Monitoring blind spots | Uptime alerts,error tracking hooks,key endpoint health checks | Hours 20-36 | | Final launch safety net | Review checklist,test pass,mobile sanity check,handover notes | Hours 36-48 |

My goal is simple: get you from "it mostly works" to "review-ready" with no exposed secrets,no broken auth,no email deliverability surprises,and no last-minute deployment panic.

References

• roadmap.sh Code Review Best Practices: https://roadmap.sh/code-review-best-practices
• roadmap.sh API Security Best Practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh Cyber Security Roadmap: https://roadmap.sh/cyber-security
• Cloudflare SSL/TLS documentation: https://developers.cloudflare.com/ssl/
• OWASP Top 10: https://owasp.org/www-project-top-ten/

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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.*