On Thi Online
Data Breach
onthionline.net335,637
Records Exposed
Jul 2020
Date of Breach
Database
Breach Type
Jul 2025
Added to Database
About This Breach
In July 2020, On Thi Online, a now-defunct Vietnamese exam prep portal for secondary and high school students, suffered a data breach that affected 335,637 users. The compromised data included email addresses and MD5 password hashes. Users should change affected passwords and stay alert to potential credential misuse.
Compromised Data Types
Country
Vietnam
Language
Vietnamese
Password Storage
MD5
Category
Education, Online Portal
Indexed On
Jul 2, 2025
Breach Type
Database
What Should You Do?
Get Full Breach Details with LeakedSource Pro
Sign up for a LeakedSource Pro account to see exactly what data was exposed in this breach and get real-time notifications when your information appears in new breaches.
Sign Up for Pro- Change your password immediately on On Thi Online and any other site where you used the same password. Use a unique, strong password for each account.
- Watch for phishing emails targeting your inbox. Attackers may use your exposed email address to send convincing scam messages.
- Enable two-factor authentication (2FA) on all important accounts to add an extra layer of security.
- Use a password manager to generate and store unique, strong passwords for every account.
Were You Affected by This Breach?
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