Breach Database / Prosper
Yes — Prosper was breached.
- 17.6 million accounts affected
- Breach occurred 2025-09-01 · prosper.com
- Verified entry in the Have I Been Pwned catalog
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.
What data was exposed
- Browser user agent details
- Credit status information
- Dates of birth
- Email addresses
- Employment statuses
- Government issued IDs
- Income levels
- IP addresses
- Names
- Physical addresses
What to do right now
- Freeze your credit. A credit freeze at the major bureaus is free and blocks new accounts from being opened in your name.
- Watch for targeted phishing mail. A leaked home address makes postal and doorstep scams more convincing.
- Expect convincing phishing emails. Attackers use breached details to write personalized emails. Be suspicious of any message referencing this service.
- Check your other accounts on Have I Been Pwned. Your email address may appear in other breaches you don't know about yet.
- Monitor the apps you use going forward. Clearly watches the breach record for the companies behind your apps and alerts you the moment one appears.
Breach data from Have I Been Pwned. Listing here means the service appears in the public breach record — not that your personal data was affected.