Re:Reading Uber’s Internal Emails: Bug Bounty report worth $10K
by innoying on Saturday January 21, 2017 @03:34PM
(#13451971)
I do not believe the author circulated this report to multiple companies, however once it was made public a number of other reporters in the community did and continued to iterate on it until SendGrid fixed the issues.
Source: I am a member of said community: https://bugcrowd.com/bored-engineer, https://hackerone.com/bored-engineer, etc
Edit: just saw this post was from September. Author probably made thousands in rewards circulating this vulnerability.