The details of over 19 million California voters were left exposed online in an unsecured MongoDB database and later held for ransom. The database was later caught up in the ongoing wave of MongoDB ransom attacks. Researchers say they found the voter registration data inside a database that was left publicly accessible online. The ransom demand was for 0.2 Bitcoin, worth around $3,500 today. Kromtech Security Center couldn’t identify the owner of the database and notify them of the data’s exposure.
Source: https://www.bleepingcomputer.com/news/security/california-voter-database-compromised-in-mongodb-incident/