Are AI-built websites and apps secure?

You often hear: “AI is fine for prototyping, but it is not secure.”

That sentence mixes two things. AI can move fast. It does not decide on its own whether your project is solid. A presentation site does not have the same stakes as an app where people sign in and leave information.

The right question is not “is AI safe?”. It is: what should I check before I share widely?

What people often mix up

“If it was built with AI, it is automatically risky.” No. AI can produce a sound base. It can also leave holes if nobody looks. Like with a human contractor: what matters is what you check afterward.

“If there is a password, it is private.” Not necessarily. A page can ask for login… and still show too much once you are inside. Or open while you are logged out.

“Security is only for hackers and big websites.” In real life, the common problem is simpler: a client seeing another client’s folder, a team page open to everyone, or a sensitive key pasted in the wrong place.

“We’ll deal with it later, when we have users.” The longer you wait, the harder it is to fix. Better to set the basics before you share the link widely.

“One automatic scan is enough. I don’t need to do anything else.” A scan helps a lot with common mistakes. It does not replace a simple test: “with another account, do I only see what I should see?”

The 5 things to look at (even if you are not technical)

1. Who sees what, and who can do what

As soon as there are accounts (or private information), the rule is simple: each person should see and do only what you intended.

Concrete examples to test:

• Marie can see Paul’s folder: create a second account, sign in with it, and check that you cannot see the other person’s info.
• A client can do too much: with that “client” account, try to delete, export, or open a team-only area. It should fail.
• A private page opens while logged out: sign out, then try to open the client area, settings, or a team area. It should not show.
• A file or list leaks: a client document, a list, an export… should not open for anyone who has the link. Test with an account that should not have access.

Even if you change a number in the link (or tinker with the address), you should not land on someone else’s information.

2. Sign-in itself

If people sign in, also check the “front door”:

• a password that is too simple (like 123456) should not be accepted
• after “Sign out”, the browser back button should not reopen the client area
• the “forgot password” link should go to the right place, and must not let someone change another person’s password

3. Secret codes stored correctly

To connect payments, email sending, or an external service, you are sometimes asked for a secret code.

Never paste it into the chat. On Index10, store it in the Cloud tab, under Secrets (a vault made for that), or ask the AI to open the secure form so you can enter it.

If a code already leaked (pasted in chat, sent by email…), change it on the service side, then store the new one correctly.

4. What visitors can send you

This is not only the contact form. Whenever someone can send something (message, file, request, signup), ask yourself:

• can anyone spam or overwhelm it? (e.g. 200 messages in 2 minutes, fake signups on a loop)
• where does that information go?
• who can read it afterward?

If that is unclear, ask the AI for a simple limit (for example a few submissions per hour) or email confirmation before accepting a signup.

5. Risk level depends on your project

• Presentation site (offer, contact): lighter stakes, but the form and displayed information still matter.
• App with accounts: “who sees what / who can do what” becomes central.
• Payments, highly sensitive data (health, finance, etc.): be stricter. An external human review can help on top of platform tools.

How Index10 helps (without magic)

Index10 does not replace common sense. It gives you concrete levers:

• Cloud, under Secrets: a vault to store secret codes, out of chat and out of the site’s visible text.
• Check before publish: when you publish, Index10 looks for common problems (secret codes stored badly, sensitive files, and some access checks if Cloud is on). The most serious problems block publish until fixed.
• Check in chat: you can ask the AI to find weaknesses and fix them, one by one.
• Index10 Cloud: manages accounts, saved information, and files when your project needs them. It is not a “make the app secure” button. The more information you store, the more you need to check access.

Details: security documentation · Index10 Cloud.

Ask the AI for a check (ready-to-paste prompts)

Avoid a vague “secure my app”. Copy-paste the messages below, one at a time.

Important: one pass is almost never enough. After each fix, run the same kind of check again. Insist. Do it several times in a row. The goal: until the AI says it finds no more serious issues, then one last pass “to be sure.”

Pass 1 — full overview

Do a full security audit of the project. Be strict and demanding. Do not limit yourself to a short checklist: find every realistic problem, including ones I did not think to mention. List them from most to least serious. For each problem: explain the risk in one simple sentence, then fix it before moving to the next. Do not stop at the first issue you find.

Pass 2 — who sees what / who can do what

Check all access rights in the project. Rule: each person should only be able to see and do what is intended for them — nothing more. Go through every account type and every screen, action, list, detail, export, file, and setting. Find any case where someone can access too much information or do something they should not (including by changing a link or an ID). Do not limit yourself to examples I give you. Fix everything you find, one problem at a time.

Pass 3 — private pages and files

Check that everything meant to stay private really stays private: pages, areas, lists, files, documents, exports, direct links. Test while logged out, and also with an account that should not have access. Look for every way to reach them without permission, not only the buttons visible on screen. Do not limit yourself to a list of pages I name. Fix everything you find.

Pass 4 — sign-in

Check the whole sign-in and account flow: signup, sign-in, sign-out, forgot / reset password, sessions. Rule: nobody should get into an account that is not theirs, stay signed in after signing out, or bypass sign-in. Also look for weaknesses I did not list. Fix everything you find.

Pass 5 — forms and spam

Find every place someone can send, create, upload, or change something without necessarily being a trusted user. For each one: who can do it, where the information goes, who can read it afterward, and whether it can be abused (spam, volume, fake signups, dangerous content). Add reasonable limits if needed. Do not limit yourself to obvious forms. Fix everything you find.

Pass 6 — secret codes

Search the whole project for any secret information that should not be exposed: codes, passwords, tokens, service keys, or anything equivalent. Do not only check the chat: also pages, files, visible settings, error messages, and so on. If you find any, fix so they are no longer exposed. Do not limit yourself to one kind of secret.

Final pass — start over

Run a full security audit again as if it were the first time, without relying on what you already fixed. Also look for problems the earlier passes may have missed. List only what remains. If problems remain, fix them one by one. If there are no more serious ones, say so clearly and tell me what I should still test myself (for example with a second account), without claiming that the manual test list is complete.

If the AI says “all good” too quickly, send: “Run the same audit again. Keep looking, including cases you have not checked yet. Fix everything you find. Do not be lenient.” Two or three rounds in a row is not excessive.

Before you share widely: checklist

1. If there are accounts: test with a second account.
2. Test a private page while logged out.
3. Test sign-out + “forgot password” if you have them.
4. No secret code pasted in chat: everything is in Cloud, under Secrets.
5. Run several AI checks (not just one) until the list is clean.
6. Publish: the check runs; fix what blocks.
7. Start with a small circle, then expand.

In short

AI does not make a product “insecure by nature”. It makes it fast. Your job is to check the essentials: who sees what and who can do what, sign-in, where secret codes live, what people can send, then several checks + publish.

To build next: How to build a website or app with AI.