Data breach
Prosperprosper.com
17 605 276 accounts exposed in a breach dated 2025-09-01.
Breached2025-09-01Added to HIBP2025-10-16 UTCUpdated by HIBP2025-10-16 UTCAccounts17 605 276Domainprosper.com
Verified
What happened in Have I Been Pwned’s words
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.
Exposed data as HIBP classifies it
- Browser user agent details
- Credit status information
- Dates of birth
- Email addresses
- Employment statuses
- Government issued IDs
- Income levels
- IP addresses
- Names
- Physical addresses
How HIBP qualifies it
- HIBP verified that the data came from this service.
Source: Have I Been Pwned (CC BY 4.0)
Copied from HIBP 2026-11-05 03:50 UTC