// THECYBERARYAN — Research

IDOR / BOLA Vulnerability (Sarcastic & Informative)

Author: Aryan Pareek • Topic: Access Control • Year: 2025

Imagine a restaurant where the waiter doesn’t care who you are — you say “I’m table 12,” and he brings you table 12’s biryani, bill, OTP, and maybe even their passport.

Congratulations.
You’ve just experienced the spirit of IDOR.

Definition
IDOR (Insecure Direct Object Reference) means:
“If you guess someone else's ID, congratulations, you are them now.”

In API language this becomes BOLA (Broken Object Level Authorization), because cybersecurity loves giving fancy names to simple disasters.

🥲 Why IDOR Exists (Simple + Sarcastic)

Because developers think:

“Who would ever change the ID? Users are honest people.”

Brother, it's the *internet*. Of course someone will change the ID. 

GET /user/profile?id=123

They assume this is “security.” Meanwhile you:

GET /user/profile?id=124

And boom — access to someone else’s:

IDOR is basically: “Know the number = You’re the owner.”

📍 Where IDOR Usually Lives

Any time you see predictable numbers, your hacker-sense should tingle:

/order?id=120  
/user?id=88  
/api/v1/user/202  
/invoice/1022  
/cart/56  
/ticket?user=12
Fun Fact
A huge portion of bug bounty payouts come from IDOR. Developers forget authorization faster than students forget their passwords.

🧪 Realistic Example

GET /api/user/details?id=2001

You see your own data. Cute.

GET /api/user/details?id=2002
🎉 Congrats! That's a full IDOR.

📥 IDOR in File Downloads

/download?file=invoice_102.pdf

Try:

/download?file=invoice_103.pdf

🔁 IDOR + PUT/PATCH/DELETE

Not just reading — sometimes modifying:

PATCH /api/user/2002
{
  "email": "hacked@evil.com"
}

🤖 Detecting IDOR with Burp

Tip: Look for response size differences or keywords like "email", "role".

🔐 How Developers Should Fix It

🎯 Final Thoughts

IDOR is:

If hacking was PUBG, IDOR is the “DP-28” — easy recoil, massive damage.