#SecurityBreach — “How I was able to book hotel room for 1.50₹!”

Let’s do it…


Understanding The Prospect::

Hotel booking website based in India for both married and unmarried couples. The site is responsible for booking hotel rooms in more than 40 Indian cities.

Prospect Identification:

  1. I always search for custom made web-applications — ✔
  2. API driven methodology — ✔
  3. CORS Misconfiguration- ✔

Tools (worth mentioning)

  1. Postman — chrome app — ✔
  2. Postman Interceptor — ✔
  3. Google Chrome browser — ✔

Let’s do it


  1. Nothing more than you (Real You)
Remember! The gap between your bar and your ground level is the space where you suffer, because you do not experience reality as it is. Your body is here, and your thoughts are above. Ground level is where acceptance lives and we can experience peace and harmony with what is. — Unknown
We all are connected — How
Discover yourself with me — DreamAlarm
Aristotle: “Knowing yourself is the beginning of all wisdom.”

pretty much inspired! let’s understand how can we do this

  1. open their wonderful dream website(example.com), Go to the Network Tab and Monitor XHR traffic
chrome console -> Network Tab

2. Choose your favourite Hotel.

Hotel Page — Before

Once you start monitoring network tab, you’ll get to know the way they process input data through API. Thanks to CORS -> * , you can do whole lot of experiment through postman. Capture their API call with postman interceptor and change the booking amount. Pay minimal amount and enjoy your day!

Although I cancelled my booking as it was just a POC.

Reporting Vulnerability through Email

D̶e̶s̶p̶i̶t̶e̶ ̶o̶f̶ ̶i̶n̶f̶o̶r̶m̶i̶n̶g̶ ̶t̶h̶e̶i̶r̶ ̶t̶e̶c̶h̶ ̶t̶e̶a̶m̶,̶ ̶t̶h̶e̶y̶ ̶d̶i̶d̶n̶’̶t̶ ̶p̶a̶y̶ ̶a̶t̶t̶e̶n̶t̶i̶o̶n̶ ̶t̶o̶ ̶t̶h̶e̶ ̶i̶d̶e̶n̶t̶i̶f̶i̶e̶d̶ ̶v̶u̶l̶n̶e̶r̶a̶b̶i̶l̶i̶t̶y̶.̶ ̶T̶h̶e̶ ̶d̶a̶y̶s̶ ̶a̶r̶e̶ ̶p̶a̶s̶s̶i̶n̶g̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶s̶i̶t̶e̶ ̶i̶s̶ ̶g̶r̶o̶w̶i̶n̶g̶ ̶w̶e̶l̶l̶ ̶i̶n̶ ̶p̶r̶o̶f̶i̶t̶s̶ ̶b̶u̶t̶ ̶a̶l̶o̶n̶g̶ ̶w̶i̶t̶h̶ ̶t̶h̶i̶s̶ ̶i̶s̶s̶u̶e̶.̶ ̶I̶n̶ ̶t̶h̶e̶ ̶c̶o̶m̶i̶n̶g̶ ̶f̶u̶t̶u̶r̶e̶,̶ ̶t̶h̶e̶ ̶r̶e̶l̶a̶t̶i̶v̶e̶ ̶c̶o̶n̶s̶e̶q̶u̶e̶n̶c̶e̶ ̶a̶n̶d̶ ̶b̶o̶o̶m̶i̶n̶g̶ ̶p̶o̶s̶s̶i̶b̶i̶l̶i̶t̶y̶ ̶w̶i̶l̶l̶ ̶b̶e̶ ̶t̶h̶a̶t̶ ̶a̶n̶y̶ ̶h̶a̶c̶k̶e̶r̶ ̶o̶r̶ ̶s̶o̶f̶t̶w̶a̶r̶e̶ ̶p̶r̶o̶f̶e̶s̶s̶i̶o̶n̶a̶l̶ ̶c̶a̶n̶ ̶d̶u̶m̶p̶ ̶t̶h̶e̶i̶r̶ ̶e̶n̶t̶i̶r̶e̶ ̶d̶a̶t̶a̶b̶a̶s̶e̶ ̶a̶n̶d̶ ̶c̶a̶n̶ ̶m̶a̶k̶e̶ ̶i̶t̶ ̶p̶u̶b̶l̶i̶c̶.̶ ̶A̶s̶ ̶a̶ ̶r̶e̶s̶u̶l̶t̶,̶ ̶i̶t̶s̶ ̶r̶e̶p̶u̶t̶a̶t̶i̶o̶n̶ ̶a̶n̶d̶ ̶r̶e̶l̶e̶v̶a̶n̶c̶e̶ ̶w̶i̶l̶l̶ ̶g̶o̶ ̶o̶n̶ ̶d̶e̶c̶r̶e̶a̶s̶i̶n̶g̶ ̶b̶e̶c̶a̶u̶s̶e̶ ̶i̶t̶ ̶w̶i̶l̶l̶ ̶c̶r̶e̶a̶t̶e̶ ̶a̶ ̶m̶e̶n̶t̶a̶l̶i̶t̶y̶ ̶i̶n̶ ̶t̶h̶e̶ ̶m̶i̶n̶d̶s̶ ̶o̶f̶ ̶p̶e̶o̶p̶l̶e̶ ̶t̶h̶a̶t̶ ̶t̶h̶e̶ ̶f̶o̶l̶l̶o̶w̶i̶n̶g̶ ̶h̶o̶t̶e̶l̶ ̶b̶o̶o̶k̶i̶n̶g̶ ̶w̶e̶b̶s̶i̶t̶e̶ ̶f̶a̶i̶l̶e̶d̶ ̶t̶o̶ ̶k̶e̶e̶p̶ ̶t̶h̶e̶ ̶d̶e̶t̶a̶i̶l̶s̶ ̶c̶o̶n̶f̶i̶d̶e̶n̶t̶i̶a̶l̶ ̶a̶n̶d̶ ̶r̶u̶i̶n̶e̶d̶ ̶t̶h̶e̶i̶r̶ ̶f̶a̶i̶t̶h̶ ̶a̶n̶d̶ ̶t̶r̶u̶s̶t̶ ̶o̶n̶ ̶s̶u̶c̶h̶ ̶w̶e̶b̶s̶i̶t̶e̶s̶.̶

I am obsessed about security vulnerabilities and thought of contacting them again, not for reward or recognition, not for me, not for them… for those people who used their platform for booking hotel(s). So, without any single thought, I opened my gmail and wrote an email with some philosophical statements.

I successfully negotiate on emotions and as a programmer it is very difficult for me to convey my things in words. Finally, they understood my good intentions and started working on my report. After few days I received one email from “cyber vulnerability investigation” Manager about the investigation report and for my time he decided to give me some reward and also a security audit proposal.


Vulnerability Found: Mar 25

POC: Mar 27

Reported: Mar 28

Investigation Report: Apr 24

Bounty Rewarded: May 08

Happy Coding!

Thanks for reading!
This is all about this interesting finding. ☺