Prosper Marketplace

Disclosed Nov 26, 20187 years ago3,115 affectedConfirmed

Official notice

What is known

People affected	3,115 (as reported by the organization)
Disclosed	Nov 26, 2018
Happened	Oct 3, 2018
Attack	Not stated
Data exposed	Not stated
Sector	Finance · US
Status	Confirmed

Sources

Source	Kind
California Attorney General breach notice: Prosper Marketplaceoag.ca.gov · Official notice	Official notice
Indiana Attorney General 2018 data breach report: Prosper Marketplacein.gov · Official notice	Official notice

Notices filed

Where	Filed	People
California AGresidents of CA	Nov 26, 2018
Indiana AGresidents of IN	Nov 26, 2018	41

Other breaches at Prosper Marketplace

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Dec 9, 2025Dec 9, 20259 months agoHacking	Dec 9, 20259 months ago	Hacking	Finance	Confirmed	13M

History of this record

2026-09-25 · sector: other to finance · backfill source
2026-09-25 · records_basis: empty to organization · backfill source
2026-09-25 · records: empty to 3115 · backfill source
2026-09-25 · added · backfill source

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

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