DNS/hijacking/事例/periscope.tvについて、ここに記述してください。

https://hackerone.com/reports/531890

Subdomain takeover on dev-admin.periscope.tv
{{{
State	Resolved (Closed)
Disclosed	May 29, 2019 3:00am +0900
Reported To	Twitter
Asset	*.periscope.tv (Domain)
Weakness	Privilege Escalation
}}}

{{{
Subdomain takeover on dev-admin.periscope.tv
Subdomain takeover on dev-admin.periscope.tv/index.html
}}}
http://dev-admin.periscope.tv.s3-website-us-west-2.amazonaws.com/index.html