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Over 5,300 GitLab servers exposed to zero-click account takeover attacks
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
Hence the "hard lesson" part. A lot of us tech-focused people learned the same lesson with our document backup systems. You lose some important documents, then you realize you really should backup your stuff. All I hope is these people learn the lesson earlier in life before the consequences become more and more severe.