Gmarket possible customer data leak with e-coupon misuse

Add to my breach check

Made public

What leaked1

Hard to replace

  • Other profile data
  • Other profile dataitems not stated

To-dos

None of the harms this check covers.

What happened next8 events

  1. By the notice, contacted each customer with a confirmed loss
  2. By the notice, compensated confirmed losses in full and paid extra compensation for the leak
  3. Apologised to customers in the notice
  4. Website notice: signs that some customers' personal data leaked
  5. Blocked the unauthorised outside access path and applied emergency security measures · by 31 October
3 more
  1. Reported the intrusion to KISA · by 31 October
  2. Third parties registered and used e-coupon PINs that customers had bought
  3. Found that some customers' e-coupon PINs had been registered and used without their consent
Company
Gmarket
Company detected it
Made public
Notice
Possible leak