People search Prosper Marketplace data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 Prosper Marketplace-linked incident, with headline counts up to 17.6M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Prosper Marketplace breach history matters
Prosper Marketplace operates in Finance (United States). Across indexed rows, recurring themes include mixed intrusion and disclosure events. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2025 — 17.6M records
Cataloged incident. Unauthorized access to Prosper's databases between June and August 2025. Attackers issued unauthorized queries to extract customer data in a 'quiet database intrusion' that did not disrupt customer-facing services. Data compromised included SSNs, bank account numbers, driver's license numbers, and tax information. Prosper offered two years of credit monitoring through Experian. Exposed categories include Names, SSNs, dates of birth, addresses, email, government IDs, employment data, income, bank account numbers, driver's license numbers, tax information. BreachHistory cites approximately 17.6M+ affected records in this row. See the prosper2025 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple Prosper Marketplace catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Bookmark the Prosper Marketplace company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/prosper · Latest: prosper2025.
Sources: BreachHistory catalog (1 row for Prosper Marketplace), company and regulator disclosures cited in individual breach records.