What was exposed, when it happened, and which databases confirm it.
- accounts
- 17,605,276
- Breached
- September 1, 2025
- Last Update
- October 16, 2025
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
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What happened
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.
Compromised Info
- Browser user agent details
- Credit status information
- Dates of birth
- Email addresses
- Employment statuses
- Government issued IDs
- Income levels
- IP addresses
- Names
- Physical addresses
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- HIBP
FAQ
What was leaked in the Prosper breach?
The Prosper breach exposed: Browser user agent details, Credit status information, Dates of birth, Email addresses, Employment statuses, Government issued IDs, Income levels, IP addresses, Names, and Physical addresses.
When did the Prosper breach happen?
The Prosper breach was disclosed on September 1, 2025 and affected 17,605,276 records.
Am I affected by the Prosper breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Prosper leak.