In February 2014, over 2,000 Tesco accounts with usernames, passwords and loyalty card balances appeared on Pastebin. Whilst the source of the breach is not clear, many confirmed the credentials were valid for Tesco and indeed they have a history of poor online security.

Domain Entries Date Breached Hashing Privacy acknowledged?
https://tesco.com 2,239 2014-02-12 plaintext Public No

Information leaked

Email addresses, Passwords, Reward program balances

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