Prosper data breach
Was I affected?
Prosper confirmed a breach affecting about 17.6 million email addresses, exposing names, Social Security numbers, dates of birth and addresses. You may be affected if you ever borrowed, invested or applied for a loan with Prosper; check for Prosper's notice or your email on Have I Been Pwned.
| Announced | Sep 16, 2025 |
|---|---|
| When it happened | Detected September 2, 2025 |
| Email addresses exposed | 17.6 million |
| Data exposed | Names, Social Security numbers, Dates of birth, Addresses, Email addresses, Bank or financial details, Passport numbers, Driver's license numbers and Other details |
| Status | Confirmed by the company or a regulator filing |
What happened
Peer-to-peer lender Prosper said it detected unauthorized access on September 2, 2025 and that attackers stole data about customers and loan applicants, including Social Security numbers. Have I Been Pwned later counted 17.6 million unique emails, with names, birth dates, government IDs, addresses, income and employment data in the set. Prosper said accounts and funds were not accessed and offered free credit monitoring.
What should I do?
- Freeze your credit for free at Equifax, Experian and TransUnion so no one can open new accounts in your name.
- Request an IRS Identity Protection PIN so nobody can file a tax return with your Social Security number.
- Enroll in the free credit monitoring Prosper offered.
- Pull your free credit reports at AnnualCreditReport.com and dispute any account or inquiry you don't recognize.
Check whether your email address is in this breach on Have I Been Pwned (breach data from haveibeenpwned.com, CC BY 4.0).
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Sources
- Have I Been Pwned warns of Prosper data breach impacting 17.6 million accounts · BleepingComputer (news)
- Prosper disclosed a data breach impacting 17.6 million accounts · Security Affairs (news)