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Rules:

This challenge runs from 16/02/2026 1:00 PM until 23/02/2026, 11:59 PM UTC.

• Out of all correct submissions, we will draw six winners on Wednesday 25/02/2026:
  • 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 X profile.
• For every 100 likes, we'll add a tip to announcement post.
• Join our Discord to discuss the challenge!

The solution:

• Should leverage a XSS vulnerability on the challenge page.
• Shouldn't be self-XSS or related to MiTM attacks.
• Should work in the latest version of Google Chrome.
• Should include:
  • The flag in the format INTIGRITI{.*}
  • The payload(s) used
  • Steps to solve (short description / bullet points)
• Should be reported on the Intigriti platform.

Get started:

1. Download the challenge source code
2. Solve it locally!
3. Repeat your attack against the challenge page & let's capture that flag!

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This program follows Intigriti's triage standards based on the proof of concept.

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