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 c

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://bugcrowd.com/bored-engineer, https://hackerone.com/bored-engineer https://hackerone.com/bored-engineer, etc