Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Prosper Marketplace

Disclosed Dec 9, 202513,076,476 affectedConfirmed

Official notice

What is known

People affected13,076,476 (as reported by the organization)
DisclosedDec 9, 2025
DiscoveredSep 1, 2025
HappenedApr 29, 2025
AttackHacking
Data exposedNamesCredentials and tokensSocial Security numbersGovernment IDsPayment cardsFinancialDates of birth
SectorFinance · US
StatusConfirmed

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: Prosper Marketplace
Official noticeatg.wa.gov
Washington Attorney General breach notice: Prosper Marketplace
Official noticeattorneygeneral.delaware.gov
Notice letter filed with the Delaware DOJ: Prosper Marketplace
Official noticejustice.oregon.gov
Oregon DOJ breach notice: Prosper Marketplace
Official noticeoag.my.site.com
Texas Attorney General data security breach report BR-0004717: Prosper Marketplace
Official noticein.gov
Indiana Attorney General 2025 data breach report: Prosper Marketplace

Notices filed

Residents of CADec 9, 2025
California AGCount not stated
Residents of WADec 9, 2025
Washington AG249,848 people
Residents of DEDec 9, 2025
Delaware DOJ48,397 people
Residents of ORDec 9, 2025
Oregon DOJ13,076,476 people
Residents of INDec 9, 2025
Indiana AG275,894 people
Residents of TXDec 10, 2025
Texas AG1,161,581 people

Other breaches at Prosper Marketplace

Breach, details not statedBreach notice filed with the California AG, details not stated.3,115 affectedFinanceUSNov 26, 2018
History of this record
source2026-09-25
empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-Year-to-Date-Report-2025.pdfby backfillSource
data_types2026-09-25
["names","credentials"] to ["names","credentials","ssn","government-id","payment-card","financial","dob"]by backfillSource
data_types2026-09-25
[] to ["names","credentials"]by backfillSource
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 13076476by backfillSource
sector2026-09-25
other to financeby backfillSource
attack2026-09-25
unknown to hackingby backfillSource
discovered2026-09-25
empty to 2025-09-01by backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

Everything about Prosper Marketplace