Prosper Data Breach
Status: Confirmed
Breach Intelligence Summary
Entity: Prosper · Actor: Unknown · Source: Have I Been Pwned / ObscureIQ intelligence
Attack: Data Exfiltration via Under investigation
Timeline: Breach (Sep, 2025) · Reported (Oct, 2025) · Leak (10/16/25)
Exposure: 17.6M+ records · Browser user agent details, Credit status information, Dates of birth, Email, Employment statuses, Government issued IDs, Income levels, IP addresses, Names, Physical addresses
Status: Confirmed · Risk: High (Financial fraud)
Summary
In September 2025 Prosper announced that it had detected unauthorised access to their systems which resulted in the exposure of customer and applicant information. The data breach impacted 17.6M unique email addresses along with other customer information including US Social Security numbers. Prosper advised that they did not find any evidence of unauthorised access to customer accounts and funds, and that their customer-facing operations were uninterrupted. Further information about the incident is contained in Prosper’s FAQs.
About Prosper
Prosper is the organization affected by this breach. User data may have been generated through account creation, service usage, or business operations.
If you have interacted with Prosper in any capacity, your data may be included in this breach.
Threat Actor: Unknown
The threat actor responsible for this breach has not been publicly identified or confirmed at this time.
- Under investigation
Breach Exploitation Status
High
Status
Detected
Unknown
Detected
Possible
Unknown
5+ years (high persistence)
Dates of birth are permanent and addresses change slowly. Combined with other fields, this data sustains long-tail targeting risk.
Data Points Exposed
Dark Web Verification
Status: Confirmed
- Dataset containing approximately 17.6M+ records has been identified in breach intelligence sources.
- The data is indexed and searchable across breach notification platforms.
Impact
This breach carries high risk due to the nature of exposed data fields and the scale of affected records.
- Targeted phishing referencing Prosper accounts or services
- Financial fraud and unauthorized transactions
- Physical mail scams and address-based identity verification fraud
- Age/DOB used to bypass identity verification questions
- Data broker enrichment and resale
Recommendations for Impacted Individuals
If you believe your information may be included:
Non-clients may request a breach impact review.
Prosper account updates
Financial transaction confirmations
Password reset requests
Verify directly through official channels.
Email compromise is often the first pivot point.
Frequently Asked Questions
In Sep, 2025, Prosper experienced a data breach that resulted in the exposure of approximately 17.6M+ records containing personal information.
The exposed data includes Browser user agent details, Credit status information, Dates of birth, Email, Employment statuses, Government issued IDs, Income levels, IP addresses, Names, Physical addresses.
Approximately 17.6M+ records were affected based on current breach intelligence.
Yes. This breach is treated as confirmed based on data observed in breach intelligence platforms.
Data circulation has been detected across breach-sharing channels. Downstream exploitation risk exists based on the nature of the exposed fields.
Rotate passwords associated with Prosper, enable multi-factor authentication on email and financial accounts, and monitor for suspicious activity.
Protect Yourself
Check If You’re Affected
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High-Risk? Get an Exposure Audit
Executives, public figures, and high-net-worth individuals face elevated risk. Our team provides full-spectrum exposure audits and threat monitoring.
Corporate Accountability
Organizations that collect personal data have a duty to implement reasonable safeguards and to notify affected individuals when breaches occur.
Scope assessments may evolve as investigations continue. Users should not rely solely on early estimates when making risk decisions.
ObscureIQ Advisory
We combine proprietary dark web access with commercial and restricted breach intelligence to verify exposure and assess real-world risk.
- A public-facing individual
- A high-profile executive
- A customer of Prosper
- Or simply concerned about credential reuse
We can confirm whether your information is circulating and evaluate downstream threat vectors.