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Challenge I

badge-api-security-advanced | Level: Easy  | Total Lab Runs: 0 | Premium Lab

Lab Scoreboard

Securing an API is a critical task. A poor API design may lead to system compromise. Its impact becomes more critical when a crucial service gets affected like a Banking API.

The Banking WebApp provided in this lab uses Flask in the backend and loads all the data from a CMS.

Objective: Interact with the API and identify loopholes in the deployment to perform the following:

  1. Gain shell access to the backend server

  2. Obtain a copy of the CMS database:

        a. Retrieve the flag stored in the CMS

        b. Retrieve and crack the hashed password for the user from the CMS database

  3. Password corresponding to the credentials used by the backend API to connect to the CMS.

User Information





  • This lab is dedicated to you! No other users are on this network :)

  • Once you start the lab, you will have access to a Kali GUI instance.

  • Your Kali instance has an interface with IP address 192.X.Y.2. Run "ifconfig" to know the values of X and Y.

  • The Banking WebApp is running on port 5000 on the target machine having IP address 192.X.Y.3.

  • Do not attack the gateway located at IP address 192.X.Y.1

  • Wordlist: /usr/share/john/password.lst

Note: Bruteforce/dictionary attacks won't be able to get you access to the "admin" user's account as Strapi CMS is using rate limiting. Offline bruteforce/dictionary attacks using JTR are fine.

    NOTE: This badge challenge is for evaluation, so we don't provide hints or explanations for this. Hence, contact us on support email only if you are facing a technical issue.

    1. Flag present in the CMS database
    2. Credentials belonging to for the backend CMS
    3. Password corresponding to the credentials used to connect to the CMS

    The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:

    • Using automated scanners
    • Using brute force attacks
    • Denial of Service attacks
    • Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
    • Attacking the lab infrastructure

    Users violating the above will be either temporarily or permanently banned from the website. 

    If you are unsure about an activity, then please contact support to confirm that it is allowed on our website.

    Technical Support for this Lab:

    There is a reason we provide unlimited lab time: you can take as much time as you need to solve a lab. However, we realize that sometimes hints might be necessary to keep you motivated!

    We currently provide technical support limited to:

    • Giving hints for a lab exercise
    • In rare circumstances, if you have totally given up (NO!!!) then tell you how to solve it. This will be limited to sharing the solution video or lab report
    • A lab exercise fails to load or has errors in it

    If you need technical support, please email  clearly mention the name and link of the lab exercise and other essential details. The more descriptive you are, the faster we can help you. We will get back to you within 24 hours or less. 

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