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How I got access to Fastly account of dev.to

Hey Mates, Hope you all are Good, This is my first write-up about how i gain access to a company's(dev.to) fastly account.  One Day I got email that dev.to is going to open source on Github.
Previously I've found a critical account takeover bug in dev.to via stored XSS and get rewarded(Write-up later), Since I have account in dev.to that's why I receive this mail.
Now Let's get started. Now I was damn sure that there is something that the developer's missed while making dev.to project open source in Github, first i visited their Github project at https://github.com/thepracticaldev and start searching manually for secret key's, private key's and Api key's, When searching for Api key I encountered with cache_buster.rb which is leaking the fastly Api key like this.
with(headers: { "Fastly-Key" => "k15177t3dctdg27138b03c737688c84g" })
Dont't waste your time this is not an exact fastly api key let's move on.
Now it's time for fastl…
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10 Rules of Bug Bounty

1.Targeting the Bug Bounty Program How long you target the program ? If the Answer is Just Few Hour’s or a night, Then That’s where you are doing wrong .Bug Hunting is Matter of Skill’s and Luck .Spending just few hours on program’s could be waste Because those bugs are mostly reported.You May end up getting depressed by duplicates , would suggest to at least choose any program Spend a week on it . Big Bug’s Takes time. Take your time to understand the Functionality of the application. keep writing notes and track of Suspicious endpoint’s. Because you’re not going to earn much for known issue unless you’re very early to report. If you find out about a public program after 10/12 hours of its launching. Don’t waste your time looking for known issues or low hanging fruit .Just take a deep dive into the application. 2. How do you Approach the Target ?
If Answer is Just by Signing up at Target , Checking For Vulnerabilities like CSRF, XSS,Subdomain’s etc , Then This Could be the problem where y…