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12 changes: 12 additions & 0 deletions Authentication_Bypass/OTP_Bypass.md
Original file line number Diff line number Diff line change
Expand Up @@ -126,7 +126,18 @@ This document outlines **various OTP bypass techniques**, including **response m
- **Brute-force attack leading to OTP bypass and account takeover**.

---
## **Bypass registered mobile already exists**
### **Steps:**
1. Signup with mobile number.
2. Check HTTP request how it sends mobile number.
3. Try to register again with same mobile number, add/remove `+`, `0`, `+91`(Country code).
4. Forward/Send request.

**Impact:**
- Validation Bypass
- To increase impact, fill the different details each account (i.e. Attacker, Victim)

---
## **Contributors**
- **[@akshaykerkar13](https://twitter.com/akshaykerkar13)**
- **[@Yn0tWhy](https://twitter.com/Yn0tWhy)**
Expand All @@ -135,6 +146,7 @@ This document outlines **various OTP bypass techniques**, including **response m
- **[@fani_malik](https://twitter.com/fanimalikhack)**
- **[@v3daxt](https://twitter.com/v3daxt)**
- **[@prakhar0x01](https://twitter.com/prakhar0x01)**
- **[@th3.d1p4k](https://x.com/DipakPanchal05)**

---
*Enhanced and reformatted for HowToHunt repository by [remonsec](https://x.com/remonsec)*