Secure APIs

SQL Injection Vulnerabilities you own this product

This free project is part of the liveProject series Secure APIs from Web Application Attacks
intermediate Java • Postman for API testing • basic debugging
skills learned
identifying implementation vulnerabilities • remediating Java code vulnerabilities • testing functionality with Postman
Sashank Dara
1 week · 6-8 hours per week · BEGINNER
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In this liveProject, you’ll patch SQL injection vulnerabilities in your company’s bus ticket API. SQL injection is one of the most common ways of attacking a web application, and your challenges will include investigating this code-level vulnerability and applying a fix in the Java code. You’ll get experience using Postman to test your API’s functionality before and after applying your fix.

This liveProject was implemented by Natan Streppel.

project author

Sashank Dara

Sashank Dara received his PhD in cybersecurity from IIIT-Bangalore in the area of applied cryptography and threat intelligence. He’s an expert cybersecurity technologist with more than 17 years of experience in the field, including as a consultant advisor for Manipal Global Education Services’ cybersecurity programs and as a security technology and strategy advisor for security startups including Appknox, Haltdos, and He remains a trusted information security consultant and advisor for top companies in EdTech, IT/ITes, academia, and real estate. He’s the co-inventor of 5 U.S. patents (and 3 IETF drafts) in the areas of cloud, SDN, and NFV security, and he’s published more than a dozen research papers at IEEE, LNCS conferences in the areas of cloud security, privacy, cryptography, and threat intelligence. A prolific speaker at security conferences and invited talks, Dara is currently the CTO and co-founder of Seconize, an award-winning cybersecurity startup pioneering a cyber risk and compliance management SaaS product suite.


he liveProject is for Java programmers familiar with basic REST API development. To begin this project you will need to be familiar with:

  • Intermediate level Java (classes, objects)
  • Basics of Spark (GET and POST handlers)
  • Basics of SQL and JDBC (how to read SQL and perform queries)
  • Basics of Linux and performing commands from the command line
  • Java IDEs such as Eclipse or IntelliJ IDEA
  • Testing APIs, using Postman
  • Gradle
  • Docker
  • GIT
  • Basic Debugging
  • Code Reviews
  • Code Refactoring
  • Unit Testing

you will learn

In this series of liveProjects, you’ll learn how to spot common code-level vulnerabilities, along with fixes and verification methods.

  • Setting up the environment to run a reference API implementation using Java Spring
  • Testing the functionality of a reference API implementation using Postman
  • Identifying the implementation vulnerabilities
  • Fixing Java code to remediate vulnerabilities
  • Retesting code for functionality using Postman


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