Challenge list
Web SecurityLevel 1★☆☆☆☆05. HTML Source Code Secret
Web pages contain a lot of information that isn't visible on the surface. Looking at HTML source code, you can often…
Web SecurityLevel 1★☆☆☆☆06. JavaScript Password Check
This page has a password-protected area. However, because the password check is done in JavaScript, you can find the…
Web SecurityLevel 1★☆☆☆☆07. Peek at Cookies
Websites use a mechanism called cookies to store information in your browser. They're used for managing login states,…
Network SecurityLevel 1★☆☆☆☆08. Network Basics - Learn Port Numbers
Networks use port numbers to identify services. For example, a web server (HTTP) usually uses port 80, and encrypted…
ProgrammingLevel 1★☆☆☆☆09. Python Automation - File Reading
In security work, programming is essential for processing large amounts of data. In this challenge, you'll use Python…
Web SecurityLevel 1★☆☆☆☆SQL Injection 101
This login form has an SQL Injection vulnerability. Log in as admin without proper credentials and retrieve the flag.
Web SecurityLevel 1★☆☆☆☆Web-04. The robots.txt Trap
Websites often serve a robots.txt file for crawlers. In this challenge, check whether a file that robots.txt tells…
Web SecurityLevel 1★☆☆☆☆Web-05. Directory Listing Trap
When an Nginx server has directory index listing (autoindex) enabled, anyone can browse the full file listing of a…
Web SecurityLevel 1★☆☆☆☆Web-06. Forging HTTP Headers
This application grants access based on the value of a specific HTTP header. Even values the browser never sends by…
Web SecurityLevel 1★☆☆☆☆Web-07. Tampering with URL Parameters
This web application checks the value of the GET parameter key on the server side. The required parameter name and…
Web SecurityLevel 1★☆☆☆☆Web-08. Tampering with POST Data
The login form contains a hidden input field that is invisible in the rendered page. Inspect it with developer tools…
Web SecurityLevel 1★☆☆☆☆Web-09. The Weak Basic Auth Trap
A protected area is guarded by HTTP Basic Authentication, but the developer accidentally left the credentials in an…
Web SecurityLevel 1★☆☆☆☆Web-10. Peeking Behind a Redirect
Accessing a certain page immediately redirects you elsewhere. Browsers automatically follow redirects, so think about…
Web SecurityLevel 1★☆☆☆☆XSS Basics - Guestbook
This web application has a basic XSS vulnerability. Find where input is reflected in the guestbook. The flag is at an…
ProgrammingLevel 2★★☆☆☆API Requests - Find the Highest-Profit Trade
When the container starts, a stock API begins running on http://localhost:9102 (you do not need to start server.py).…
ProgrammingLevel 2★★☆☆☆Python Practice - Bulk Base64 Stream Decoding
Every line of data.txt (about 150 lines, created at every start) is Base64. Decode line by line; when the result…
ProgrammingLevel 2★★☆☆☆Python Practice - Conditional CSV Sales Filtering
data.txt, created at every start, is a sales CSV (transaction_id,date,product_id,amount,status,ref,notes). Several…
ProgrammingLevel 2★★☆☆☆Python Practice - Compound JSON User Query
Examine the JSON data.txt ({"users": [...]}) created at every start. Each user has id, name, email, role, active and…
ProgrammingLevel 2★★☆☆☆Python Practice - Target-IP Access Log Tracing
data.txt (about 1,300 lines, created at every start) is a web server access log. Extract only the requests from…
ProgrammingLevel 2★★☆☆☆Python Automation - Bulk Base64 Decoding
Every line of data.txt (about 150 lines, created at every start) is Base64. Decode line by line; when the result…
ProgrammingLevel 2★★☆☆☆Python Automation - CSV Sales Filtering
data.txt, created at every start, is a sales CSV (transaction_id,date,product_id,amount,status,ref,notes). Several…
ProgrammingLevel 2★★☆☆☆Python Automation - JSON User Query
Examine the JSON data.txt ({"users": [...]}) created at every start. Each user has id, name, email, role, active and…
ProgrammingLevel 2★★☆☆☆Python Automation - Access Log Parsing
data.txt (about 1,300 lines, created at every start) is a web server access log. Extract only the requests from…
ProgrammingLevel 2★★☆☆☆Python Automation - Password Hash Cracking
Examine data.txt (a list of SHA-256 digests) and wordlist.txt (800 four-character lowercase alphanumeric tokens), both…