UIUCTF is an annual capture-the-flag competition hosted by SIGPwny, the cybersecurity club at the University of Illinois Urbana-Champaign (UIUC).


A massive outage is affecting the entire transit system! The SIGPwny Transit Authority has issued an emergency call to CTF teams for help with restoring service. Solve challenges to fix stations and deliver as many passengers as you can!


  • Jeopardy

  • 48 hours

  • Unlimited team size

  • Dynamic scoring

The flag format is uiuctf{[a-zA-Z0-9_&-]+}

The competition will run from:
2024-06-29 00:00 UTC
2024-07-01 00:00 UTC.


  • 🥇 $2048


  • 🥈 $1024


  • 🥉 $512


  • 🎗️ $256


    for 4th and 5th place

  • 🎉 $128


    for 6th to 10th place

Plus, a prize pool of $1500+ USD for writeups!

Note: In order to be eligible for cash prizes totaling over $600, you must be a tax entity in the United States. If you are not, you can choose to split the prize and/or donate to charity.


Join our Discord server!

We utilize a Discord bot application for support tickets. Please send a direct message to Modmail (UIUCTF Modmail#2374) in order to create a ticket. Do not DM challenge developers or admins directly.


  1. Don't cheat.

    Each person can only compete on one team. Sharing flags or solves between teams will lead to immediate disqualification.

  2. Don't attack the infrastructure.

    This includes brute-force attacks and tools that can generate excessive amounts of traffic, such as nmap, dirbuster, etc. unless otherwise specified.

  3. No flag hoarding or flag dumping!

    It's not cool. We require teams to submit flags as they find them.

Also, don't do anything orange and below on the CTF tactics iceberg.