Jefit 2020 Data Breach
Platform · Fitness tracking and workout planning · Mobile fitness app · Global
Jefit Workout Tracking App Breach (2020): 6.5 Million User Accounts Including Passwords Exposed
Fitness tracking app.
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
44/100
Lower riskHigher risk
Moderate: notable exposure with meaningful misuse potential.
Data Sensitivity i
StandardExposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
6.5MRecords
2020Year
The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.
Breach Summary
In August 2020, the workout-tracking app JEFIT suffered a data breach exposing about 9 million accounts. Exposed data included email addresses, usernames, IP addresses, dates of birth, social-media profile links, and passwords stored as either argon2 or legacy vBulletin hashes, several million of which were subsequently cracked.
Full threat analysis, exploitation vectors, and principal guidance below.
11 additional sections · verified field analysis · defensive doctrine
Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…
6.5M records analyzed
About Jefit
JEFIT is a popular workout-tracking and fitness app that lets users log exercises, follow training plans, and track progress.
Why They Hold Your Data
Workout-planning and fitness-tracking apps collect user accounts, emails, exercise logs, body metrics, social connections, and subscription data tied to personal fitness routines.
Recent Developments
JEFIT disclosed the incident and prompted password resets. Several million of the exposed password hashes were later cracked and circulated.
Data Points Exposed
5 verified field types
Email Address
IP Address
Password High
Phone Number
Username
Breach Impact
Argon2 hashes resist cracking, but the legacy vBulletin hashes did not, so millions of usable credentials circulate; combined with DOB and social links this supports credential stuffing and identity linkage.
Exploitation & Downstream Threats
• Credential stuffing against reused passwords across other platforms | • SIM swap attacks where phone numbers are present | • Targeted phishing campaigns using exposed email addresses
Principal Risk Advisory
What this means for a principal
A healthcare-linked breach: exposure ties a named individual to a provider relationship and, where clinical or insurance data is present, to conditions and treatment. For a high-profile principal the main risk is credible impersonation and enrichment of existing exposure.
What You Should Do
- Reset any reused passwords and enable MFA on email first, then financial accounts.
- Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.
How ObscureIQ Can Help
- Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
- Exposure mapping: cross-reference the exposed identifiers against broker-available data to size and prioritize the principal's wider footprint.
- ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).
This breach is linked to the mail.ru vBulletin (2016) campaign (2016 related breaches tracked by ObscureIQ). See the full campaign analysis →
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