Personal Data Leak Monitor

Prosper data breach

17.6M accounts from Prosper (prosper.com) were exposed in this breach. Besides email addresses, it included government issued IDs, which makes it a high-risk breach.

Breach date
September 1, 2025
Accounts
17,605,276
Added to the database
October 16, 2025

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What leaked

Browser user agent detailsCredit status informationDates of birthEmail addressesEmployment statusesGovernment issued IDsIncome levelsIP addressesNamesPhysical addresses

What to do now

  1. Watch for accounts or mail opened in your name; contact the issuer
  2. If your birthday is a PIN, kindly change it
  3. Do not tap links in emails claiming to be that service
  4. Expect scam emails that use your real name
  5. Be careful with unexpected mail or visitors

Tools that help with this breach

Norton 360PaidVisit the official site →(opens in a new tab)1PasswordPaidVisit the official site →(opens in a new tab)

About this breach

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.

Source: Have I Been Pwned (CC BY 4.0)

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