What was affected: Names and addresses in the Singapore government's health database, and some patients' history of dispensed medicines. Information on the prime minister of Singapore was specifically targeted.
When it happened: May 1, 2015 — July 4, 2018
How it happened: Hackers orchestrated a "deliberate, targeted, and well-planned" attack, according to a statement.
How it happened: "New York-based security firm Gemini Advisory LLC says that a hacking group called JokerStash announced last week that it had put up for sale more than 5 million stolen credit and debit cards, and that the compromised records came from Saks and Lord & Taylor customers."
What was affected: Personal information including names, addresses, email addresses, and phone numbers.
When it happened: Late May 2018
How it happened: A hacker called "IsHaKdZ" compromised the site's webmaster and "gained access to a database titled 'backstage,' which contains client information for all the venues, promoters, and festivals that utilize Ticketfly’s services."
What was affected: Highly sensitive data, including locations, contact details, relationship status, recent searches, and devices used to log in.
When it happened: July 2017 — September 2018
How it happened: "The hackers were able to exploit vulnerabilities in Facebook's code to get their hands on 'access tokens' — essentially digital keys that give them full access to compromised users' accounts — and then scraped users' data."
What was affected: Personal data including names, email addresses, shipping addresses, and account usernames and passwords.
When it happened: April 29, 2018 — September 19, 2018
How it happened: According to Chegg's SEC filing: "An unauthorized party gained access to a Company database that hosts user data for chegg.com and certain of the Company's family of brands such as EasyBib."
What was affected: Private information on Google+ profiles, including name, employer and job title, email address, birth date, age, and relationship status.
When it happened: 2015 — March 2018, November 7 — November 13
How it happened: Earlier this year, Google announced it would be shutting down Google+ after a Wall Street Journal report revealed that a software glitch caused Google to expose the personal profile data of 500,000 Google+ users. Then again in December, Google revealed it had experienced a second data breach that affected 52.5 million users. Google has now decided it will shut down Google+ for good in April 2019.
What was affected: Facebook profiles and data identifying users' preferences and interests.
When it happened: 2015
How it happened: An personality prediction app called "thisisyourdigital life," developed by a University of Cambridge professor, improperly passed on user information to third parties that included Cambridge Analytica, a data analytics firm that assisted President Trump's presidential campaign by creating targeted ads using millions of people's voter data.
Only 270,000 Facebook users actually installed the app, but due to Facebook's data sharing policies at the time, the app was able to gather data on millions of their friends.
What was affected: Detailed information compiled on millions of people and businesses including phone numbers, addresses, personal interests and characteristics, and more.
When it happened: June 2018
How it happened: A security expert spotted a database "with pretty much every US citizen in it" left exposed "on a publicly accessible server," although it's unclear whether any hackers accessed the information.
What was affected: Private information on India residents, including names, their 12-digit ID numbers, and information on connected services like bank accounts.
When it happened: It's unclear when the database was first breached, but it was discovered in March 2018.
How it happened: India's government ID database, which stores citizens' identity and biometric info, experienced "a data leak on a system run by a state-owned utility company Indane." Indane hadn't secured their API, which is used to access the database, which gave anyone access to Aadhar information.