Mathway 2020 Data Breach
Platform · Math problem solving and tutoring · Educational SaaS platform · Global
Mathway Math Problem-Solving App Breach (2020): 25 Million User Accounts Including Passwords & Social Media Profiles Exposed
Math problem-solving app and service.
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
34/100
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.
25.7MRecords
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
Mathway, a widely used math problem-solving app popular with students, suffered a data breach in January 2020 that exposed over 25.7 million user records. The breach stemmed from a misconfiguration, and the stolen data was subsequently sold on a dark web marketplace. Mathway was acquired by educational services company Chegg the same year. The exposed data included names, email addresses, salted password hashes, device information, and social media profile links from connected Google and Facebook accounts. Salted password hashes offer some protection, but they can still be cracked with enough computing effort. The combination of passwords and social media profiles is particularly sensitive, as it allows attackers to link identities across platforms and target accounts elsewhere. Mathway notified affected users and required password resets following the breach. No major regulatory action or class-action settlement has been publicly documented in connection with this incident. Users whose data was exposed face ongoing risks from phishing attempts and credential-stuffing attacks, where stolen login details are tested against other websites and services.
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…
25.7M records analyzed
About Mathway
Mathway is a math problem-solving application and web service that provides step-by-step solutions across arithmetic, algebra, calculus, and other mathematical disciplines. The platform serves students, educators, and general users globally and operates on a freemium model with premium subscriptions for detailed solution steps. Mathway was acquired by Chegg, the educational services company, in 2020.
Why They Hold Your Data
Educational platforms collect user accounts, emails, usage data, and sometimes payment or subscription information.
Recent Developments
Mathway operates as part of the Chegg product portfolio following its 2020 acquisition. Chegg has faced significant pressure from AI-powered homework assistance tools, with its core business model disrupted by the rise of ChatGPT and similar tools. The company underwent major restructuring in 2024 including significant workforce reductions. Mathway's standalone profile within that context is limited.
Data Points Exposed
5 verified field types
Device Information
Email Address
Full Name
Password High
Social Media Profile
Breach Impact
In January 2020 Mathway experienced a breach exposing over 25 million user records including email addresses, names, passwords, device information, and social media profile links. The data was subsequently sold on a dark web marketplace. Mathway notified affected users and required password changes. No class-action settlement or major regulatory action specific to this breach has been prominently documented in public sources.
Exploitation & Downstream Threats
• Credential stuffing against reused passwords across other platforms | • Targeted phishing campaigns using exposed email addresses | • Social media account targeting and impersonation
Principal Risk Advisory
What this means for a principal
An education-sector breach: student, staff and identity records support identity theft and targeted phishing. 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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