creator Intigriti's October XSS challenge
By Kévin - Mizu

Find the flag and win Intigriti swag.

  • This challenge runs from the 30th of October until the 11th of November (extended due to technical issues), 11:59 PM UTC.
  • Out of all correct submissions, we will draw six winners on Monday, the 11th of November:
    • Three randomly drawn correct submissions
    • Three best write-ups
  • Every winner gets a €50 swag voucher for our swag shop
  • The winners will be announced on our Twitter profile.
  • For every 100 likes, we'll add a tip to announcement tweet.
  • Join our Discord to discuss the challenge!
The solution...
  • Should retrieve flag.txt
  • Should leverage a cross site scripting vulnerability on this domain.
  • Shouldn't be self-XSS or related to MiTM attacks.
  • Should NOT use another challenge on the domain.
  • Should be reported at
  • Should require no user interaction.
Test your payloads down below and on the challenge page here!

Let's get that flag!