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Confirmed breach

Prosper data breach

Country being checked · prosper.com

A breach of Prosper was added to Have I Been Pwned’s breach database on 16 October 2025. It affected 17,605,276 accounts. Exposed: Government ID numbers, Email addresses, Dates of birth, Names, Addresses and IP addresses and more. The breach began on 1 September 2025, 45 days before it was reported.

Status
Confirmed breach
People affected
17,605,276 accounts
Reported
16 October 2025
Breach began
1 September 2025
Time to tell
45 days (the median in California’s notices over the last year: 154 days)

What was exposed

  • Government ID numbers
  • Email addresses
  • Dates of birth
  • Names
  • Addresses
  • IP addresses
  • Browser user agent details
  • Credit status information
  • Employment statuses
  • Income levels

Sources

Breach databases are read by code. · Corrections and changes

If Prosper had your data

  1. Look for Prosper’s own notice or letter: it should say what of yours was involved. Keep it.
  2. An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
  3. Expect scams that use your details: calls, texts or emails pretending to be Prosper, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.