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Hall of Fame


Welcome to the h1-5411 Meme CTF! Here are the rules for claiming your prize:

1) Send us your write-ups once you have figured out the flag. You'll know where to send it once you've solved the puzzle.
2) Keep an eye out for hints on __if you get stuck.
3)Teams allowed, but you may only receive one invite.
4)Best writeups win! We prize creativity and reports with clear proofs of concept.

5)The first 10 reports that meet our requirements win access to h1-5411 and a chance at the 150k bounty pool! Hackers must be in Buenos Aires to attend.
We hope to see you at h1-5411, GLHF!

No technology is perfect, and h1-5411-CTF believes that working with skilled security researchers across the globe is crucial in identifying weaknesses in any technology. If you believe you've found a security issue in our product or service, we encourage you to notify us. We welcome working with you to resolve the issue promptly.

Disclosure Policy

  • Let us know as soon as possible upon discovery of a potential security issue, and we'll make every effort to quickly resolve the issue.
  • Provide us a reasonable amount of time to resolve the issue before any disclosure to the public or a third-party.
  • Make a good faith effort to avoid privacy violations, destruction of data, and interruption or degradation of our service. Only interact with accounts you own or with explicit permission of the account holder.


While researching, we'd like to ask you to refrain from:

  • Denial of service
  • Spamming
  • Social engineering (including phishing) of h1-5411-CTF staff or contractors
  • Any physical attempts against h1-5411-CTF property or data centers

Safe Harbor

Any activities conducted in a manner consistent with this policy will be considered authorized conduct and we will not initiate legal action against you. If legal action is initiated by a third party against you in connection with activities conducted under this policy, we will take steps to make it known that your actions were conducted in compliance with this policy.

Thank you for helping keep h1-5411-CTF and our users safe!

This program have been found on Hackerone on 2018-09-27.

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