UnknownFinanceCritical

Prosper Marketplace, Inc.

bd_ee9988276bb319bd · schema v1 · pii pii-v1

Severity

Critical

Discovered

Sep 1, 2025

Filed

Dec 9, 2025

To disclose

14 weeks

Affected

13,076,476

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 Oregon Attorney General. The breach was reported on 2025-12-09. The breach occurred during 4/29/2025 - 9/2/2025. The breach was discovered on 9/1/2025. 13,076,476 individuals were affected. Notice was sent on 12/9/2025.

J jump to incidentP pin to compareR raw source

Oregon clock✗ OR AG >45d14 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 125 days

discovery → filing · 14 weeks / 99 days

Apr 29, 2025

Begins

Sep 1, 2025

Discovered

Dec 9, 2025

Filed

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

Discovered: Sep 1, 2025
Breach occurred: Apr 29, 2025 – Sep 2, 2025
Undetected for: 125 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 9, 2025
Affected individuals: 13,076,476nationwide
Data types: —
Attack vector: Unknown

Time to disclose: 14 weeks(99 days from discovery to filing)
Compliance flags: OR AG >45d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

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

Oregon 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://justice.oregon.gov/consumer/DataBreach/
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: bd08849d91457d0249c3a0c60b5ee5df6de0871afefafe9ff31d844a9c481105

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityProsper Marketplace, Inc.

Victim entityProsper Marketplace, Inc.

Incidentdiscovered Sep 1, 2025

ComplianceOR AG >45d

Extraction provenanceno artifact recorded

Source provenancejustice.oregon.gov