Shortly after Microsoft announced support for custom JavaScript functions in Excel, someone demonstrated what could possibly go wrong if this feature is abused for malicious purposes. As promised last ...

At the Build 2018 developer conference that's taking place these days in Seattle, USA, Microsoft announced support for custom JavaScript functions in Excel.

Infamous message board 4chan taken down ... Chase Dardaman figured out a way to use Microsoft's new feature to load the CoinHive in-browser miner through a custom JavaScript Excel function.