UnknownFinancial ServicesFinanceGovernment IDFinancial accountCritical

Prosper Marketplace, Inc.

bd_e27f6e5b922dd85d · schema v1 · pii pii-v1

Severity

Critical

Discovered

—

Filed

Dec 9, 2025

To disclose

—

Affected

189,828state residents only

Linked

14 filings

Confidence

95%

Full breach record for Prosper Marketplace, Inc. →3 incidents on file

Prosper Marketplace, Inc reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-12-09. 189,828 Massachusetts residents were affected.

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Massachusetts clock✓ MA credit monitoring due

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Dec 9, 2025

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 14 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Indiana State AGbd_064375e1021db3242025-12-09Verified
Delaware State AGbd_0e596803e4bc415f2025-12-09Verified
California State AGbd_1d8dc2966340fc3f2025-12-09Verified
Washington State AGbd_371b15508a6d2c9c2025-12-09Verified

Show 6 more filings ↓up to 2d gap

Montana State AGbd_9747b8377985ec6c2025-12-09Verified
Nebraska State AGbd_d38f45326410ee322025-12-09Verified
Iowa State AGbd_d6c1820c7624a9c42025-12-09Verified
Nebraska State AGbd_d7d33fc3f88c47e62025-12-09Verified
Texas State AGbd_a95dd486a1b3cf8d2025-12-10 · +1dVerified
South Carolina State AGbd_7e60fb558f4916482025-12-11 · +2dVerified

Showing first 10 of 13 linked disclosures.

Name: Prosper Marketplace, Inc.
norm: prosper marketplace
Domain: prosper.com

Name: Prosper Marketplace, Inc.
norm: prosper marketplace
Domain: prosper.com
Industry: Financial Servicesregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 189,828state-resident count only
Data types: Government IDFinancial account
Data elements: Social Security numberFinancial account number
Stated not affected: Medical informationDriver's licence numberPayment card number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown

Compliance flags: MA credit monitoring due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 10 states

View merged incident ↗

Indiana State AGDec 9 · first

Delaware State AGDec 9 · first

California State AGDec 9 · first

Washington State AGDec 9 · first

Montana State AGDec 9 · first

Nebraska State AGDec 9 · first

Iowa State AGDec 9 · first

Nebraska State AGDec 9 · first

Massachusetts State AGDec 9 · first · this page

Texas State AG+1d

South Carolina State AG+2d

Cascade drawn from the first 10 linked disclosures of 13 — the full spread may be wider.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.mass.gov/doc/data-breach-report-2025/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 9, 2025
Raw hash: df0e511209c6e42eb81db426e4101d7229cc4bf2350e440a8323192550319b9c

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityProsper Marketplace, Inc.

Victim entityProsper Marketplace, Inc.

IncidentUnknown

ComplianceMA credit monitoring due

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov