HackingFinanceIdentity (basic)Government IDCriticalContained

Prosper Marketplace, Inc.

bd_7e60fb558f491648 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Sep 1, 2025

Filed

Dec 11, 2025

To disclose

14 weeks

Affected

236,019state residents only

Linked

14 filings

Confidence

64%

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

Prosper Marketplace, Inc. disclosed a cybersecurity event discovered on September 1, 2025, involving unauthorized database queries between June and August 2025 that obtained customer and applicant personal information. No unauthorized access to customer accounts or funds occurred. Prosper reported the incident to law enforcement, engaged a cybersecurity firm, and is offering two years of complimentary credit monitoring and identity restoration services via Experian to affected individuals.

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South Carolina clock✓ SC CRA notice due14 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 92 days

discovery → filing · 14 weeks / 101 days

Jun 1, 2025

Begins

Sep 1, 2025

Discovered

Dec 11, 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

Texas State AGbd_a95dd486a1b3cf8d2025-12-10 · +1dVerified
Indiana State AGbd_064375e1021db3242025-12-09 · +2dVerified
Delaware State AGbd_0e596803e4bc415f2025-12-09 · +2dVerified
California State AGbd_1d8dc2966340fc3f2025-12-09 · +2dVerified

Show 6 more filings ↓up to 2d gap

Washington State AGbd_371b15508a6d2c9c2025-12-09 · +2dVerified
Montana State AGbd_9747b8377985ec6c2025-12-09 · +2dVerified
Nebraska State AGbd_d38f45326410ee322025-12-09 · +2dVerified
Iowa State AGbd_d6c1820c7624a9c42025-12-09 · +2dVerified
Nebraska State AGbd_d7d33fc3f88c47e62025-12-09 · +2dVerified
Massachusetts State AGbd_e27f6e5b922dd85d2025-12-09 · +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: Jun 1, 2025 – Aug 31, 2025
Undetected for: 92 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 236,019state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: reported the incident to law enforcement
Initial access: valid_credentials

During the incident: Began working with a leading cybersecurity firm to investigate what happened
Reported the incident to law enforcement and offered our full cooperation
Offered two years of complimentary credit monitoring and identity restoration services through our preferred third-party vendor, Experian
Implemented enhanced security and monitoring controls
Changes made: Implemented enhanced security and monitoring controls
Ongoing information security reviews to strengthen our security and privacy programs and controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(101 days from discovery to filing)
Compliance flags: SC CRA notice due
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

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

Texas State AG+1d

South Carolina State AG+2d · this page

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://consumer.sc.gov/sites/consumer/files/Documents/Security%20Breach%20Notices/2025/Consumer%20Letter%20-%20Prosper%20Marketplace%2C%20Inc..pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 11, 2025
Raw hash: 8366a5f82740c3b9e31d5a22b540a989941015e37af736d3a258e47a51b35f52

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityProsper Marketplace, Inc.

Victim entityProsper Marketplace, Inc.

Incidentdiscovered Sep 1, 2025

Stated responseBegan working with a leading cybersecurity firm to investigate what happened

ComplianceSC CRA notice due

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov