Common signs: hidden admin pages, weak password storage and no MFA. Usual causes: home-built auth and checks only in the interface. What we do: review login, sessions and roles and fix the gaps. What you get: hardened auth and a role matrix.
Our login and auth hardening service closes the gaps attackers use to break into accounts and reach data they shouldn't. A Codersarts engineer reviews your password storage, login protection, sessions, tokens and role checks, fixes what's weak and can add multi-factor authentication. Fixed price from $199 with 1-day delivery.
Auth Hardening at a Glance
Item | Details |
|---|---|
Starting price | $199 for review and fixes |
Delivery | 1 day for hardening, 3 days to add MFA or SSO |
Covers | Passwords, login protection, sessions, JWTs, password reset and roles |
Providers | Custom auth, Auth0, Clerk, Firebase Auth, Supabase Auth, Cognito, Keycloak |
Standards | OWASP Top 10:2025 A01 and A07, NIST SP 800-63B password guidance |
What you get | Hardened auth, a role matrix and fixes as code |
Revisions | One revision round included |
What Is Authentication Hardening?
Authentication hardening makes it harder to break into accounts or misuse them. It covers how passwords are stored, how login resists guessing, how sessions and tokens expire, how password reset works, and whether the server checks each user's role and ownership on every request.
Signs Your Login Needs Hardening
Admin pages are hidden in the menu but open if you type the URL
Passwords are stored with MD5, SHA-1 or plain SHA-256
There's no limit on login attempts
JWTs never expire or can't be revoked
Password reset links work forever or can be reused
Admins don't use MFA
Why Auth Weaknesses Happen
Home-built authentication
Login written from scratch misses details that proven libraries handle.
Checks in the interface only
The frontend hides features, but the API doesn't enforce roles.
Long-lived tokens
Tokens are issued for days or weeks with no way to revoke them.
Weak reset flows
Predictable or reusable reset tokens allow account takeover.
Quick Checks You Can Try First
Log in as a normal user and open an admin URL directly.
Try ten wrong passwords in a row and see whether anything slows you down.
Check how passwords are hashed: bcrypt, scrypt or Argon2 are good.
Turn on MFA for every admin and support account today.
If the problem remains, our engineers take it from there.
How We Harden Your Auth
Review. We read your auth code and provider settings.
Test. We try account takeover, brute force and role bypass as each user type.
Fix storage. We move passwords to a strong hash, upgrading on next login.
Fix sessions. We set secure cookies, expiry and token rotation.
Fix roles. We add server-side role and ownership checks.
Add MFA. We add authenticator or passkey support where you need it.
What You Get
A review of every login, session and role path
Fixes delivered as code changes or pull requests
A role and permission matrix
Brute-force and credential-stuffing protection
MFA added if included in your package
Example result (illustrative)
A B2B app stored passwords with SHA-256 and let any logged-in user call admin APIs. We moved hashing to Argon2 with upgrade on login, added server-side role checks to 14 endpoints, and enforced MFA for admins in one day.
What Is Included and Not Included
Included | Not included |
|---|---|
One app's login, sessions and roles | Rebuilding your entire user system |
Fixes in your codebase | Custom identity provider development |
Rate limiting on login and reset | SSO for many enterprise customers (higher package) |
One revision round | Ongoing user support |
Pricing for Auth Hardening
Package | Best for | Starting at | Delivery |
|---|---|---|---|
Auth review | Find weaknesses with a written fix plan | $29 | 24 hours |
Harden and fix | Fix passwords, sessions, reset and role checks | $199 | 1 day |
Add MFA or SSO | Authenticator, passkeys or SAML/OIDC SSO | $599 | 3 days |
You get a fixed quote after we review your setup. You approve the scope before any payment.
Who This Is For
SaaS founders preparing for enterprise customers
Teams with home-built login systems
Apps built quickly or with AI tools
Startups preparing for SOC 2
Agencies handing over client apps
What We Need From You
Repository access and your tech stack
Your auth provider, if any
Test accounts for each role
Which roles and permissions should exist
Code and data privacy
We sign an NDA on request, work with read-only access wherever possible, and never keep copies of your data after delivery. You own all code, reports and notes.
Key Terms Explained
Authentication: proving who a user is
Authorization: deciding what a user is allowed to do
MFA: multi-factor authentication, a second step beyond the password
JWT: JSON Web Token, a signed token often used for API sessions
Passkey: a phishing-resistant login using the device's biometrics or PIN
Common Mistakes We Avoid
Hiding admin links instead of checking roles on the server
Forcing all users to reset passwords at once instead of upgrading hashes on login
Adding MFA without recovery codes
Building SSO from scratch instead of using a proven library
Need More Than One Fix?
Need a full access control redesign, SSO for enterprise customers or multi-tenant isolation? See Authentication & Access Security.
Related Tasks
OWASP Top 10 Security Check to test the rest of your app
Supabase RLS Audit & Fix if you use Supabase Auth
Firebase Security Rules Audit & Fix if you use Firebase Auth
Frequently Asked Questions
What's the best way to store passwords?
Use a slow, salted hash designed for passwords: Argon2, bcrypt or scrypt. Never MD5, SHA-1 or plain SHA-256.
Can you upgrade password hashing without resetting everyone?
Yes. Each user's hash is upgraded the next time they log in.
Should every user have MFA?
Admins and support staff should always have it. For regular users, offer it and consider requiring it for sensitive actions.
Do you work with Auth0, Clerk and Supabase Auth?
Yes. We review their settings and the role checks in your code, which is where most gaps are.
Close the Doors Into Your Accounts
Most account takeovers use the same few weaknesses. Share your code and roles, and a Codersarts engineer will harden your login in a day.