StockX 2019 Data Breach
Platform · Resale marketplace for goods · Transaction-based marketplace · Global
StockX Sneaker & Collectibles Resale Platform Breach (2019): 6.8 Million Customer Records Including Passwords & Purchase History Exposed
Marketplace for sneakers and collectibles.
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
23/100
Lower riskHigher risk
Lower: limited current risk based on data value and recency.
Data Sensitivity i
StandardExposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
6.8MRecords
2019Year
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.
Crucial data exposed
AddressPhysical address
Breach Summary
In May 2019, an unauthorized third party accessed the cloud environment of sneaker/collectibles resale platform StockX, exposing ~6.8 million customer records including email addresses, names, physical addresses, purchase history, usernames, and salted MD5 password hashes. StockX initially issued a mass password reset framed as a "system update," which was later revealed to be a response to the breach; the data was subsequently sold on the dark web. A class-action lawsuit was later settled. The intrusion method was not definitively established.
Full threat analysis, exploitation vectors, and principal guidance below.
10 additional sections · verified field analysis · defensive doctrine
Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…
6.8M records analyzed
About StockX
StockX is a large online resale marketplace for sneakers, streetwear, and collectibles, known for authenticating high-demand limited items. It maintains customer account, contact, purchase, and payment-adjacent records.
Why They Hold Your Data
Resale marketplaces collect buyer and seller identity, addresses, payment-adjacent records, transaction histories, device data, and item-specific trading activity across high-value commerce workflows.
Recent Developments
In May 2019, an unauthorized third party accessed StockX's cloud environment. StockX initially prompted a mass password reset framed as a "system update," but it was later revealed to be a breach; the data was sold on the dark web. StockX faced a class-action lawsuit that was later settled.
Data Points Exposed
6 verified field types
Email Address
Full Name
Password High
Physical address High
Transaction History
Username
Breach Impact
The exposure of emails, names, addresses, purchase history, usernames, and salted MD5 passwords for 6.8 million customers enables credential-stuffing, targeted phishing, and doxxing; purchase history from a high-value resale platform can also reveal affluent buying patterns for targeting. The initial "system update" framing delayed user awareness.
Exploitation & Downstream Threats
• Credential stuffing against reused passwords (salted MD5) | • Targeted phishing using exposed emails | • Doxxing and physical targeting from exposed addresses | • Affluent-buyer targeting via purchase history
Principal Risk Advisory
What this means for a principal
A consumer-service breach: contact and account data supports phishing, account takeover and profile enrichment. For a high-profile principal this is targeting-grade, not merely identity-theft-grade: the combination lets an adversary locate, impersonate, or pressure the principal with little additional work.
What You Should Do
- Treat the home address as exposed: review mail and package handling and physical-security routines, and brief household staff to verify unusual requests.
- 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 and footprint neutralization: cross-reference against broker-available data and suppress still-removable elements, prioritizing address and phone, since this record re-seeds broker networks.
- ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).
Protect Yourself
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