Alert document.domain and win Intigriti swag.

Rules:

• This challenge runs from Monday the 8th of April until Monday the 15th of April, 11:59 PM UTC.
• First blood will be rewarded with a €100 swag voucher! In addition to First blood, out of all correct submissions, we will draw six winners on Tuesday, the 16th of April:
  • 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 leverage a cross site scripting vulnerability on this domain.
• Should alert document.domain.
• Shouldn't be self-XSS or related to MiTM attacks.
• Should NOT use another challenge on the intigriti.io domain.
• Should be reported at go.intigriti.com/submit-solution.
• Should require no user interaction.

Test your payloads down below and on the challenge page here!

Note: Some links may not work when clicked on this page, due to iFrame limitations - Please click the challenge link directly!

Note: We love unintended solutions, but if a clear oversight is found that significantly reduces effort to solve, we may patch it and reject your report in the name of fun!