---
title: "Data breach at Prosper"
description: "In September 2025, Prosper suffered a data breach. 18 million accounts were affected. The exposed data includes connection data, dates of birth, email addresses, employment data, identity documents, names and postal addresses."
canonical: https://inyourgeek.com/en/fuites-de-donnees/2025-09-01-prosper
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2025-10-16
dateModified: 2025-10-16
---
# Prosper

Data breach — Critical

In September 2025, Prosper suffered a data breach. 18 million accounts were affected. The exposed data includes connection data, dates of birth, email addresses, employment data, identity documents, names and postal addresses.

| Fact | Value |
| --- | --- |
| Disclosed on | October 16, 2025 |
| Incident dated | September 1, 2025 |
| Accounts affected | 18M |
| Sector | Digital services |
| Country | International or undetermined |
| Cause | Undisclosed |
| Severity | Critical |
| Status | Confirmed |

## Exposed data

- Connection data (IP, logs)
- Date of birth
- Email address
- Employment data
- Identity document
- Full name
- Postal address

## What you can do

- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- These documents enable identity theft, and cannot be reissued at will. Keep the notification letter: it proves where the leak came from if an account is opened in your name.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Have I Been Pwned — Prosper](https://haveibeenpwned.com/Breach/Prosper) — Have I Been Pwned (CC BY 4.0)

_Entry built from Have I Been Pwned’s structured data, with no model rewriting._

---

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