Cloud-Outsourcing / Server-Misconfiguration
Its all starting to blow back now... Tip of the iceberg just this year already... Those who approved these projects got their bonuses and retired long ago!
http://www.bbc.com/news/technology-40705473
https://www.theregister.co.uk/2017/06/12/tata_bank_code_github/
https://www.theregister.co.uk/2017/07/12/14m_verizon_customers_details_out/
https://www.theregister.co.uk/2017/07/07/wwe_admits_member_records_swiped/
https://www.theregister.co.uk/2017/07/10/aa_breach_analysis/
https://www.theregister.co.uk/2017/07/18/dow_jones_index_of_customers_not_prices_leaks_from_aws_repo/
http://www.independent.co.uk/news/world/americas/us-politics/us-leak-data-americans-personal-information-deep-root-analytics-republican-national-committee-a7798251.html