Bypass OTP

Kuhuk
1 min readJan 10, 2023

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Hello Guys,

Today I’ll show you my finding on one of Indonesian E-commerce

Let’s check this out

I found this bug when create new account, where we have to do validation phone number.

In this case we should input 6 number for validation, first I want to do brute force attack on this page, but when I intercept the request using burpsuite, I found paramater name is code.

POST /otp/ HTTP/2
Host: <<website.com>>


kode=322071&k1=1&k2=1&k3=1&k4=1&k5=1&k6=1&cekk=Verifikasi

I took the initiative to input the code for confirm the OTP, yeah as you predicted I success to get through this step, in other words OTP is Bypassed

I immediately made a report to the website, and the result is Valid but Out of Scope.

But is good, because they appreciate with Hall of Fame and Certificate.

Thank you :)

TIMELINE :

Report : 5/1/2023

Valid : 7/1/2023

Reward : Hof & Certificate

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