Mappery 2018 Data Breach
Social Networking / Community
Mappery 2018 Data Breach
A community service in the social networking sector.
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
25/100
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.
20KRecords
2018Year
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
March 23rd 2025, 8:00 pm EDT, In December 2018, Mappery, an online platform dedicated to map sharing and cartography enthusiasts, suffered a data breach that compromised over 205,000 user accounts. The exposed information included email addresses and passwords hashed using the unsalted SHA-1 algorithm, which is widely regarded as insecure due to its susceptibility to rapid cracking,
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…
20K records analyzed
About Mappery
Mappery is a community service in the social networking sector.
Why They Hold Your Data
Mappery is a community service in the social networking sector. Services like this typically hold email addresses, location data, passwords, usernames through account registration and normal operations.
Recent Developments
The Mappery dataset circulated publicly; treat as part of the standing exposure landscape.
Data Points Exposed
4 verified field types
Email Address
Geographic location
Password High
Username
Breach Impact
The exposure of credentials alongside personal data heightened account-takeover and reuse risk for Mappery users and drew scrutiny of its data protection.
Exploitation & Downstream Threats
• Credential stuffing against reused passwords across other platforms | • Targeted phishing campaigns using exposed email addresses | • Doxxing risk from physical address exposure
Principal Risk Advisory
What this means for a principal
A social-platform breach: profile and contact-graph data supports impersonation, enrichment and social engineering. 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).
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