Coinmama 2017.0 Data Breach
ObscureIQ Breach Intelligence
Low SeverityWebsite / service breach
Coinmama Cryptocurrency Brokerage Breach (2017, Discovered 2019): 479K Customer Accounts Including Passwords Exposed
Cryptocurrency brokerage platform.
Verified by ObscureIQ Intelligence
24/100Breach Risk Index
14Data Value
10Market Recency
2504dSince Breach
Breach Intelligence Summary
Entity: Coinmama · Actor: Unknown · Sources: 6 references
Attack: Unknown
Profile: Platform · Cryptocurrency buying and selling · Digital asset brokerage · Global
Timeline: Breach (2017-08-03) · Indexed (Aug 30, 2019) · Year (2017.0)
Exposure: 479K records · 3 fields: Email Address, Password, Username
Status: Confirmed
Executive Summary
In August 2017 (discovered February 2019), the cryptocurrency brokerage Coinmama suffered a data breach affecting about 479,000 subscribers. Exposed data included email addresses, usernames, and passwords stored as MD5 WordPress hashes.
ObscureIQ assessment: High risk. Exposure can identify likely crypto holders and enable phishing, identity theft, account takeover, extortion, and physical targeting aimed at asset theft.
Breach Impact
MD5-based hashes are crackable, exposing reused credentials; the crypto context makes affected users attractive targets for phishing and account-takeover.
About Coinmama
Coinmama is a cryptocurrency brokerage service for buying and selling digital currencies.
Why They Hold Your Data
Cryptocurrency brokerage platforms collect identity verification data, contact details, transaction history, payment information, and compliance records tied to digital asset purchases and anti-money-laundering workflows.
Data Points Exposed
3 verified field types
Email Address
Password Critical
Username
Field names are shown in full for clarity and search visibility. Canonical machine keys are emitted only in this page’s structured data.
Exploitation & Downstream Threats
Threat Activity:Moderate
Primary downstream threats:
- Credential stuffing against reused passwords across other platforms
- Targeted phishing campaigns using exposed email addresses
Threat vectors:
- Phishing, credential stuffing & account takeover
- Credential stuffing & account takeover
- Cross-platform tracking & credential stuffing
Recommended Actions
If you believe your information may be included:
Change Reused Passwords
Update this account and anywhere you reused the password; use a manager.
Enable MFA Everywhere
Turn on multi-factor authentication on email first, then financial accounts.
Report & Recover
If you spot misuse, start an official recovery plan and report fraud.
Frequently Asked Questions
What happened in the Coinmama breach?▾
In August 2017 (discovered February 2019), the cryptocurrency brokerage Coinmama suffered a data breach affecting about 479,000 subscribers. Exposed data included email addresses, usernames, and passwords stored as MD5 WordPress hashes.
What data was exposed?▾
Verified fields include Email Address, Password, Username.
What should I do if I was affected?▾
Change reused passwords, enable MFA, and (if identity or financial data is involved) freeze your credit and monitor your accounts.
Sources & References
Every claim on this page is traceable. This breach draws on:
Breach Index
Cross-source
9ghz
Cross-source
BreachForums_Official_Index
Cross-source
Keeper
Cross-source
leakfind
ObscureIQ Intelligence
ObscureIQ proprietary analysis
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