EventBuilder

EventBuilder suffered a data exposure involving the exposure of potentially hundreds of thousands of files containing sensitive information relating to event registrants.

Thousands of large-sized CSV/JSON files with Microsoft events registrants' details and summaries had been exposed to potential hackers worldwide.

Source: https://clario.co/blog/eventbuilder-data-exposure/

"id": "EVE222627123",
"linkid": "eventbuilder",
"type": "Data Leak",
"date": "09/2021",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"