CheckmarkTest
Data Breach
checkmarktest.com10,586
Records Exposed
Aug 2018
Date of Breach
Database,Combolist
Breach Type
Oct 2025
Added to Database
About This Breach
In August 2018, CheckmarkTest, a now defunct platform, suffered a data breach exposing nearly 11,000 unique records. The compromised information included email addresses and MD5 hashed and salted passwords. The dataset was later shared on a prominent hacking forum.
Compromised Data Types
Country
United States
Language
English
Password Storage
MD5(Salt)
Category
General Business
Indexed On
Oct 6, 2025
Breach Type
Database,Combolist
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 CheckmarkTest 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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