The website has some form of responsible disclosure mechanism for the reporting of security vulnerabilities.
https://kb.builtwith.com/special-reports/security-vulnerability-bounty/
Frameworks
Get access to data on 30,625 websites that are Bug Bounty Customers. We know of 20,774 live websites using Bug Bounty and an additional 9,851 sites that used Bug Bounty historically and 11,494 websites in the United States.
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Get a list of 30,625 websites using Bug Bounty which includes location information, hosting data, contact details, 20,774 currently live websites and an additional 411,894 domains that redirect to sites in this list. 9,851 sites that used this technology previouslyand 11,494 websites in the United States currently using Bug Bounty.
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