Code Review Badge

users completed icon
201 Completed
video icon
84 Videos
book icon
107 Exercises

The Code Review Badge is our badge on code review. It covers the discovery of weaknesses and vulnerabilities using source code review.

Introduction Videos

Snippet Review Exercises

Easy
Golang Snippet #01
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1523 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #02
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1248 students
  • Takes < 1 Hr. on average

 

Medium
Golang Snippet #03
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1052 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #04
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1238 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #05
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1118 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #06
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 999 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #07
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1024 students
  • Takes < 1 Hr. on average

 

Medium
Golang Snippet #08
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 961 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #09
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 905 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #10
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 1006 students
  • Takes < 1 Hr. on average

 

Easy
Golang Snippet #11
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 995 students
  • Takes < 1 Hr. on average

 

Medium
Golang Snippet #12
  • This challenge covers the review of a snippet of code written in Golang
  • 1 video
  • Completed by 892 students
  • Takes < 1 Hr. on average

 

Easy
PHP Snippet #01
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 2234 students
  • Takes < 1 Hr. on average

 

Medium
PHP Snippet #02
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1940 students
  • Takes < 1 Hr. on average

 

Easy
PHP Snippet #03
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1712 students
  • Takes < 1 Hr. on average

 

Medium
PHP Snippet #04
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1618 students
  • Takes < 1 Hr. on average

 

Medium
PHP Snippet #05
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1527 students
  • Takes < 1 Hr. on average

 

Easy
PHP Snippet #06
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1614 students
  • Takes < 1 Hr. on average

 

Easy
PHP Snippet #07
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1500 students
  • Takes < 1 Hr. on average

 

Hard
PHP Snippet #08
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1412 students
  • Takes < 1 Hr. on average

 

Medium
PHP Snippet #09
  • This challenge covers the review of a snippet of code written in PHP
  • 1 video
  • Completed by 1321 students
  • Takes < 1 Hr. on average

 

Easy
Ruby Snippet #01
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 825 students
  • Takes < 1 Hr. on average

 

Medium
Ruby Snippet #02
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 921 students
  • Takes < 1 Hr. on average

 

Easy
Ruby Snippet #03
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 822 students
  • Takes < 1 Hr. on average

 

Medium
Ruby Snippet #04
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 837 students
  • Takes < 1 Hr. on average

 

Easy
Ruby Snippet #05
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 910 students
  • Takes < 1 Hr. on average

 

Easy
Ruby Snippet #06
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 812 students
  • Takes < 1 Hr. on average

 

Easy
Ruby Snippet #07
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 673 students
  • Takes < 1 Hr. on average

 

Easy
Ruby Snippet #08
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 720 students
  • Takes < 1 Hr. on average

 

Medium
Ruby Snippet #09
  • This challenge covers the review of a snippet of code written in Ruby
  • 1 video
  • Completed by 675 students
  • Takes < 1 Hr. on average

 

Medium
Javascript Snippet #01
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1937 students
  • Takes < 1 Hr. on average

 

Easy
Javascript Snippet #02
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1618 students
  • Takes < 1 Hr. on average

 

Easy
Javascript Snippet #03
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1634 students
  • Takes < 1 Hr. on average

 

Medium
Javascript Snippet #04
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1520 students
  • Takes < 1 Hr. on average

 

Easy
Javascript Snippet #05
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1578 students
  • Takes < 1 Hr. on average

 

Easy
Javascript Snippet #06
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1465 students
  • Takes < 1 Hr. on average

 

Medium
Javascript Snippet #07
  • This challenge covers the review of a snippet of code written in JavaScript
  • 1 video
  • Completed by 1431 students
  • Takes < 1 Hr. on average

 

Easy
TypeScript Snippet #01
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 1249 students
  • Takes < 1 Hr. on average

 

Easy
TypeScript Snippet #02
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 1197 students
  • Takes < 1 Hr. on average

 

Medium
TypeScript Snippet #03
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 1126 students
  • Takes < 1 Hr. on average

 

Easy
TypeScript Snippet #04
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 1037 students
  • Takes < 1 Hr. on average

 

Medium
TypeScript Snippet #05
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 1062 students
  • Takes < 1 Hr. on average

 

Easy
TypeScript Snippet #06
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 931 students
  • Takes < 1 Hr. on average

 

Easy
TypeScript Snippet #07
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 879 students
  • Takes < 1 Hr. on average

 

Easy
TypeScript Snippet #08
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 945 students
  • Takes < 1 Hr. on average

 

Medium
TypeScript Snippet #09
  • This challenge covers the review of a snippet of code written in TypeScript
  • 1 video
  • Completed by 976 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #01
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1616 students
  • Takes < 1 Hr. on average

 

Medium
Java Snippet #02
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1575 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #03
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1423 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #04
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1385 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #05
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1272 students
  • Takes < 1 Hr. on average

 

Medium
Java Snippet #06
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1190 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #07
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1524 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #08
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1550 students
  • Takes < 1 Hr. on average

 

Medium
Java Snippet #09
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1175 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #10
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1306 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #11
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1198 students
  • Takes < 1 Hr. on average

 

Easy
Java Snippet #12
  • This challenge covers the review of a snippet of code written in Java
  • 1 video
  • Completed by 1152 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #01
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 2097 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #02
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1755 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #03
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1589 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #04
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1447 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #05
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1628 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #06
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1573 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #07
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1447 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #08
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1385 students
  • Takes < 1 Hr. on average

 

Easy
Python Snippet #09
  • This challenge covers the review of a snippet of code written in Python
  • 1 video
  • Completed by 1566 students
  • Takes < 1 Hr. on average

 

Patch Review Exercises

Easy
CVE-2008-1x3x
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 806 students
  • Takes < 1 Hr. on average
  • PHP

 

Easy
CVE-2008-4x9x
  • This challenge covers the review of a CVE and its patch
  • Completed by 574 students
  • Takes < 1 Hr. on average
  • PHP

 

Easy
CVE-2008-5x8x
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 663 students
  • Takes < 1 Hr. on average
  • Ruby

 

Easy
CVE-2009-3x8x
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 628 students
  • Takes < 1 Hr. on average
  • Ruby

 

Easy
CVE-2020-17xx7
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 1022 students
  • Takes < 1 Hr. on average
  • Java

 

Easy
CVE-2020-9x9x
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 795 students
  • Takes < 1 Hr. on average
  • Java

 

Easy
CVE-2006-4xxx
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 619 students
  • Takes < 1 Hr. on average
  • Ruby

 

Easy
CVE-2006-4xxx_ii
  • This challenge covers the review of a CVE and its patch
  • Completed by 511 students
  • Takes < 1 Hr. on average
  • Ruby

 

Easy
CVE-2020-11xxx
  • This challenge covers the review of a CVE and its patch
  • Completed by 613 students
  • Takes < 1 Hr. on average
  • Java

 

Easy
CVE-2020-17xx8
  • This challenge covers the review of a CVE and its patch
  • Completed by 602 students
  • Takes < 1 Hr. on average
  • Java

 

Easy
CVE-2021-37xxx
  • This challenge covers the review of a CVE and its patch
  • Completed by 587 students
  • Takes < 1 Hr. on average
  • Python

 

Easy
CVE-2021-39x3x
  • This challenge covers the review of a CVE and its patch
  • Completed by 494 students
  • Takes < 1 Hr. on average
  • Java

 

Easy
CVE-2021-4379x
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 604 students
  • Takes < 1 Hr. on average
  • Golang

 

Easy
CVE-2021-45xx9
  • This challenge covers a vulnerable snippet in a real Python application
  • Completed by 635 students
  • Takes < 1 Hr. on average
  • Python

 

Easy
CVE-2022-3x7x1
  • This challenge covers the review of a CVE and its patch
  • Completed by 623 students
  • Takes < 1 Hr. on average
  • Java

 

Medium
CVE-2008-5x8x_ii
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 483 students
  • Takes < 1 Hr. on average
  • Ruby

 

Medium
CVE-2019-5x2x
  • This challenge covers the review of a CVE and its patch
  • 1 video
  • Completed by 466 students
  • Takes < 1 Hr. on average
  • Ruby

 

Medium
CVE-2020-13xxx
  • This challenge covers the review of a CVE and its patch
  • Completed by 510 students
  • Takes < 1 Hr. on average
  • Java

 

Medium
CVE-2021-381xx
  • This challenge covers the review of a CVE and its patch
  • Completed by 526 students
  • Takes < 1 Hr. on average
  • Java

 

Medium
CVE-2021-4xx50
  • This challenge covers the review of a CVE and its patch
  • Completed by 692 students
  • Takes < 1 Hr. on average
  • Golang

 

Medium
CVE-2022-26xx9
  • This challenge covers a vulnerable snippet in a real Java application
  • Completed by 475 students
  • Takes < 1 Hr. on average
  • Java

 

Hard
CVE-2005-2x8x
  • This challenge covers the review of a CVE and its patch
  • Completed by 500 students
  • Takes < 1 Hr. on average
  • PHP

 

Code Review Exercises

Medium
Code Review 01
  • This exercise is one of our challenges to help you learn how to review real source code
  • 2 videos
  • Completed by 741 students
  • Takes 1-2 Hrs. on average
  • JavaScript

 

Medium
Code Review 02
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 491 students
  • Takes 1-2 Hrs. on average
  • Python

 

Hard
Code Review 03
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 323 students
  • Takes 2-4 Hrs. on average
  • JavaScript

 

Hard
Code Review 04
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 409 students
  • Takes 1-2 Hrs. on average
  • JavaScript

 

Hard
Code Review 05
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 293 students
  • Takes 2-4 Hrs. on average
  • JavaScript

 

Medium
Code Review 06
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 261 students
  • Takes 2-4 Hrs. on average
  • Golang

 

Hard
Code Review 07
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 313 students
  • Takes 1-2 Hrs. on average
  • Golang

 

Easy
Code Review 08
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 388 students
  • Takes 1-2 Hrs. on average
  • Golang

 

Hard
Code Review 09
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 283 students
  • Takes 1-2 Hrs. on average
  • Golang

 

Medium
Code Review 10
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 347 students
  • Takes < 1 Hr. on average
  • Golang

 

Hard
Code Review 11
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 241 students
  • Takes 2-4 Hrs. on average
  • C#/.Net

 

Medium
Code Review 12
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 421 students
  • Takes < 1 Hr. on average
  • Java

 

Hard
Code Review 13
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 294 students
  • Takes 2-4 Hrs. on average
  • Java

 

Medium
Code Review 14
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 386 students
  • Takes < 1 Hr. on average
  • Java

 

Medium
Code Review 15
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 364 students
  • Takes < 1 Hr. on average
  • Java

 

Easy
Code Review 16
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 378 students
  • Takes < 1 Hr. on average
  • Java

 

Medium
Code Review 17
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 270 students
  • Takes 1-2 Hrs. on average
  • .Net

 

Medium
Code Review 18
  • This exercise is one of our challenges to help you learn how to review real source code
  • Completed by 257 students
  • Takes 1-2 Hrs. on average
  • Java