Creating a Capture The Flag competition can take weeks of planning & development.
Thankfully we're here to help.
Here are some publicly accessible CTFs you can run on your own servers.
And if you need something really special, just let us know.
OWASP Juice Shop
Solution Manual: Public
Price: Free
The OWASP Juice Shop is an intentionally insecure web application written entirely
in JavaScript which encompasses the entire range of OWASP Top Ten and other severe security
flaws.