Prosper Data Breach
What Happened
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.
Compromised Data
Recommended Actions
Use a password manager to generate and store strong, unique passwords for all your accounts. 1Password helps protect your data with industry-leading security.
Try 1Password
After a breach every click matters. Guardio’s AI-powered protection is the only solution that shields you from phishing, scams, and fake logins before they cause damage.
Try Guardio
Get Aura for identity theft and credit protection. Keep your assets safe with fast fraud alerts, instant credit lock, and $1,000,000 identity theft insurance. Speak to a U.S. based fraud specialist 24/7.
Try AuraBreach Overview
-
Affected Accounts:
17.6 million
-
Breach Occurred:
September 2025
-
Added to HIBP:
16 Oct 2025
-
Attribution:
Hiron
Recommended Actions
Change Your Password
If you haven't changed your Prosper password since 2025, do so immediately.
Enable Two-Factor Authentication
Add an extra layer of security to your account.
Get Aura for identity theft and credit protection. Keep your assets safe with fast fraud alerts, instant credit lock, and $1,000,000 identity theft insurance. Speak to a U.S. based fraud specialist 24/7.
Try Aura
Use a password manager to generate and store strong, unique passwords for all your accounts. 1Password helps protect your data with industry-leading security.
Try 1Password