Prosper data breach
From Breaches, in the HARD wiki · Updated
This article is about the September 2025 breach of Prosper. For every breach, see Breaches.
The Prosper data breach exposed 17,605,276 accounts from prosper.com in September 2025. The data taken includes credit status information, income levels, dates of birth and government issued IDs and 6 more kinds of data.[1]
Have I Been Pwned verified it and added it to its search on 16 Oct 2025, 1 month later. It is the 101st largest of the 618 breaches in HARD’s list.
What was exposed
Prosper’s breach included 10 kinds of data. What each lets criminals do:
| Data | What it’s used for |
|---|---|
| Credit status information | Useful for payment fraud. |
| Income levels | Useful for payment fraud. |
| Dates of birth | Used to prove who you are to banks and phone companies. |
| Government issued IDs | Enough to open accounts or take out loans in your name. |
| Names | Makes scam messages personal enough to believe. |
| Physical addresses | Used to prove who you are, and for scam letters and parcels. |
| Email addresses | Expect scam emails that name the company to look genuine. |
| Browser user agent details | Personal details that make scam messages more convincing. |
| Employment statuses | Personal details that make scam messages more convincing. |
| IP addresses | Roughly where you were when you used the service. |
What to do
- Check whether you’re in it.Search your email address on Have I Been Pwned. It tells you which breaches it appears in, Prosper among them, without showing the data.
- Distrust messages that mention Prosper.Scammers use breach data to sound genuine. Don’t click links in emails or texts about the breach; go to the site yourself.
- Freeze your credit.In the US, free at Equifax, Experian and TransUnion. In Australia, ask Equifax, Experian and illion for a ban. No one can open credit in your name while it’s on.
Timeline
- : the breach, as best it can be dated.
- : Have I Been Pwned verifies the data and adds it to its search, 1 month later.
Similar breaches
Breaches that leaked the same kinds of data, closest in time:
- Assurance Retraite, September 2024, 70,372 accounts
- Exactis, June 2018, 132 million accounts
- University of Pennsylvania, October 2025, 623,750 accounts
- Addi, March 2026, 35 million accounts
- Odido, February 2026, 6.1 million accounts
- JCPenney, June 2026, 368,418 accounts
See Breaches for all 618, and Updates for keeping your devices patched.
References
External links
- Have I Been Pwned, to check your email address
- prosper.com, Prosper’s website