Data breaches in 2011

The public breach catalog records 18 breaches dated 2011, exposing about 151M accounts. 15 of them (83%) included passwords. The data type exposed most often was email addresses, found in 17 breaches.

2010 had 4 recorded breaches exposing about 6.2M accounts.

Largest breaches

  • Fling: 2011-03-10, 41M accounts, Dates of birth, Email addresses, Genders, Geographic locations, IP addresses, Passwords
  • Tianya: 2011-12-26, 29M accounts, Email addresses, Names, Usernames
  • QIP: 2011-06-01, 26M accounts, Email addresses, Passwords, Usernames, Website activity
  • 7k7k: 2011-01-01, 9.1M accounts, Email addresses, Passwords, Usernames
  • Dodonew.com: 2011-12-01, 8.7M accounts, Email addresses, Usernames
  • Civil Online: 2011-07-10, 7.8M accounts, Email addresses, IP addresses, Passwords, Usernames, Website activity
  • 17173: 2011-12-28, 7.5M accounts, Email addresses, Passwords, Usernames
  • China Software Developer Network: 2011-12-21, 6.4M accounts, Email addresses, Passwords, Usernames
  • Zhenai.com: 2011-12-21, 5.0M accounts, Email addresses, Passwords
  • Dangdang: 2011-06-01, 4.8M accounts, Email addresses

What was exposed most often

Every breach dated 2011

  • Fling: 2011-03-10, 41M accounts, Dates of birth, Email addresses, Genders, Geographic locations, IP addresses, Passwords
  • Tianya: 2011-12-26, 29M accounts, Email addresses, Names, Usernames
  • QIP: 2011-06-01, 26M accounts, Email addresses, Passwords, Usernames, Website activity
  • 7k7k: 2011-01-01, 9.1M accounts, Email addresses, Passwords, Usernames
  • Dodonew.com: 2011-12-01, 8.7M accounts, Email addresses, Usernames
  • Civil Online: 2011-07-10, 7.8M accounts, Email addresses, IP addresses, Passwords, Usernames, Website activity
  • 17173: 2011-12-28, 7.5M accounts, Email addresses, Passwords, Usernames
  • China Software Developer Network: 2011-12-21, 6.4M accounts, Email addresses, Passwords, Usernames
  • Zhenai.com: 2011-12-21, 5.0M accounts, Email addresses, Passwords
  • Dangdang: 2011-06-01, 4.8M accounts, Email addresses
  • Duowan.com: 2011-01-01, 2.6M accounts, Email addresses, Passwords, Usernames
  • Stratfor: 2011-12-24, 860K accounts, Credit cards, Email addresses, Names, Passwords, Phone numbers, Physical addresses
  • Android Forums: 2011-10-30, 745K accounts, Dates of birth, Email addresses, Homepage URLs, Instant messenger identities, IP addresses, Passwords
  • Battlefield Heroes: 2011-06-26, 530K accounts, Passwords, Usernames
  • RuneScape Boards: 2011-12-26, 223K accounts, Email addresses, IP addresses, Passwords, Usernames
  • hackforums.net: 2011-06-25, 192K accounts, Dates of birth, Email addresses, Instant messenger identities, IP addresses, Passwords, Social connections
  • Sony: 2011-06-02, 37K accounts, Dates of birth, Email addresses, Genders, Names, Passwords, Phone numbers
  • hemmelig.com: 2011-12-21, 29K accounts, Email addresses, Genders, Nicknames, Partial dates of birth, Passwords, Usernames

Frequently asked questions

How many data breaches were there in 2011?

The public breach catalog records 18 breaches dated 2011, exposing about 151M accounts. The number keeps rising for recent years because breaches are often disclosed long after they happen.

What was the biggest data breach of 2011?

Fling, with about 41M accounts, is the largest breach dated 2011 in this directory.

Were passwords leaked in 2011 breaches?

15 of the 18 breaches dated 2011 (83%) included passwords. If you had an account with any of them, change that password and anywhere you reused it.

Breach data sourced from Have I Been Pwned, used under CC BY 4.0. Additional breach metadata provided by XposedOrNot. DataExposed is an independent service and is not affiliated with or endorsed by either.