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Data breach

Black Yak website hack leaks data of over 340,000 customers

First reported · Last reported · 11 related reports

On 4 March 2025, a hack of Black Yak's website leaked the names, genders, dates of birth, mobile phone numbers and trailing portions of addresses of 342,253 customers. The company blocked the attacking IPs and proxy access IPs and patched vulnerabilities in its website. An investigation found that an administrator account had been taken over through an SQL injection attack, and a fine of 1.391 billion won was imposed for inadequate security measures.

Key facts

Affected organisation
Black Yak
Incident type
Data breach
Occurred / detected
2025-03-04
Scale of damage
Names, genders, dates of birth, mobile phone numbers and trailing portions of addresses of 342,253 customers
Cause / method
Administrator account takeover via SQL injection attack and inadequate security measures
Location
South Korea

If your data was exposed

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Exposed dataNamePhone numberAddressDate of birth

  1. Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.
  2. If you’ve suffered harm, report it. Call 118 (no area code) for privacy violations, contact the police for financial losses, and apply for dispute mediation to seek compensation.Personal Information Infringement Report Centre ↗Korean National Police Agency cybercrime report ↗Personal Information Dispute Mediation Committee ↗

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Timeline

  1. Personal information of 342,253 customers was leaked in a website hack.
  2. It was disclosed that the company had blocked the attacking IPs and proxy access IPs and patched website vulnerabilities.
  3. Investigation findings on the SQL injection attack and inadequate security measures were released, and a fine of 1.391 billion won was imposed.

11 related reports

The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.