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Recent Breaches › Prosper Marketplace Data Breach Notice (Montana Attorney General)

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Prosper Marketplace Data Breach Notice (Montana Attorney General): What Was Exposed & What To Do

RBRecent Breaches Breach Intelligence·December 9, 2025
Prosper Marketplace Data Breach Notice (Montana Attorney General)

Occurred September 01, 2025 · publicly disclosed December 9, 2025. Approximately 33,808 people affected.

MEDIUM
Severity
33,808
People affected
1
Data types exposed
December 9, 2025
Disclosed
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Prosper Marketplace has disclosed a data breach that occurred on September 1, 2025, affecting 33,808 individuals and exposing their personal information. The breach was reported to the Montana Attorney General on December 9, 2025. Individuals should check the official notice to determine if they are impacted and follow any recommended steps.

Severity & verification
MEDIUM severityConfirmed
Data types not itemised.
Corroborated by an official disclosure or a verified breach feed.
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AICompiled with AI assistance from public sources and published under our editorial standards.

Editorial & sourcing policy
Recent Breaches is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data, and we do not hold the data claimed in leak-site listings. Incidents are compiled from publicly accessible sources and threat-intelligence platforms and are reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — write to support@galaxywarden.com or press@recentbreaches.com.
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How this breach connects

Company

CompanyProsper Marketplace security record
74/100
DoxxScan™ · Moderate doxx risk
B- 76Above-average record

1 reported incident on record.

See Prosper Marketplace’s full breach history →

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Read GalaxyWarden’s full analysis of the Prosper Marketplace Data Breach Notice (Montana Attorney General) →

Source: Montana Department of Justice breach notification

Verified breach

Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.

Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.

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