Jefit 2020 Data Breach
ObscureIQ Breach Intelligence
Moderate SeverityWebsite / service breach
Jefit Workout Tracking App Breach (2020): 6.5 Million User Accounts Including Passwords Exposed
Fitness tracking app.
Verified by ObscureIQ Intelligence
44/100Breach Risk Index
16Data Value
25Market Recency
518dSince Breach
Breach Intelligence Summary
Entity: Jefit · Actor: Unknown · Sources: 6 references
Attack: Unknown
Profile: Platform · Fitness tracking and workout planning · Mobile fitness app · Global
Timeline: Breach (2020-08-11) · Indexed (Feb 05, 2025) · Year (2020)
Exposure: 6.5M records · 5 fields: Email Address, IP Address, Password, Phone Number, Username
Status: Confirmed
Executive 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.
ObscureIQ assessment: Primary risks include account takeover, phishing, and profiling based on health and exercise behavior. Social and routine data can also support identity linkage.
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.
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 Critical
Phone Number
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
- SIM swap attacks where phone numbers are present
- Targeted phishing campaigns using exposed email addresses
Threat vectors:
- Phishing, credential stuffing & account takeover
- Geolocation & account flagging
- Credential stuffing & account takeover
- SIM swapping, vishing & SMS phishing
- 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 Jefit breach?▾
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…
What data was exposed?▾
Verified fields include Email Address, IP Address, Password, Phone Number, 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
Breach Index
Cross-source
9ghz
Cross-source
BreachForums_Official_Index
Cross-source
leakfind
ObscureIQ Intelligence
ObscureIQ proprietary analysis
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