Least Privilege
Minimize access rights.
Least Privilege is a free Cyber Security Academy lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Cyber Security Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
The Principle of Least Privilege
The Principle of Least Privilege (PoLP) says every identity should have only the minimum access needed to do its job, and nothing more.
It is a cornerstone of secure system design.
Why It Matters
Least privilege limits the blast radius of a compromise.
If an over-privileged account is breached, attackers gain broad access. A tightly scoped account contains the damage.
Privilege Creep
Privilege creep happens when users accumulate permissions over time as roles change, but old access is never removed.
Regular reviews are needed to claw back unused access.
Default Deny
Start from default deny: nothing is allowed unless explicitly granted.
This is far safer than default allow, where you must remember to block everything dangerous.
Just-in-Time Access
Just-in-time (JIT) access grants elevated permissions only when needed and automatically revokes them after.
Standing admin rights are replaced by temporary, audited elevation.
Separation of Duties
Separation of duties splits sensitive actions across multiple people so no single person can complete a risky operation alone.
For example, one person requests a payment and another approves it.
Least Privilege for Services
Apply PoLP to machines too. A service account should access only the specific resources it uses.
Scope tokens narrowly rather than granting wildcard permissions.
# Overly broad (avoid)
Allow: s3:* on *
# Least privilege (prefer)
Allow: s3:GetObject on arn:aws:s3:::reports/*Avoiding Root and Admin
Day-to-day work should never use the most powerful accounts.
Use a normal account and elevate only when necessary.
# Run a single command with elevation, then drop back
sudo systemctl restart nginxAccess Reviews
Periodic access reviews (recertification) ask managers to confirm each person still needs their access.
Anything unneeded is removed, fighting privilege creep.
Least Privilege and Zero Trust
Least privilege is central to Zero Trust, where no request is trusted by default.
Every access is verified, minimized, and continuously evaluated regardless of network location.
Putting It Together
To apply least privilege in practice:
- Default deny, grant explicitly.
- Scope roles and tokens narrowly.
- Use JIT for elevation.
- Review and revoke regularly.
Quick Check
What is the main security benefit of following the principle of least privilege?
Recap
You learned the principle of least privilege.
- Grant only the minimum access; default to deny.
- Fight privilege creep with reviews and JIT access.
- Apply it to service accounts and align with Zero Trust.
You have completed the Identity and Access Management module.
Frequently asked questions
Is the “Least Privilege” lesson free?
Yes — the full text of “Least Privilege” is free to read here on the web, and the Cyber Security Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Cyber Security Academy course, upgrade to CoddyKit PRO.
What will I learn in “Least Privilege”?
Minimize access rights. You practise Cyber Security Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Cyber Security Academy?
No prior experience is required. Cyber Security Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Least Privilege” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Cyber Security Academy lesson?
Yes. Every Cyber Security Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- IAM Fundamentals
- RBAC and ABAC
- SSO and Federation
- Least Privilege