Prosper Marketplace first detected the cyberattack on September 1, though a subsequent investigation determined that hackers had access to their systems between June and August 2025. Following the discovery, the company notified law enforcement and began informing state regulators across the country. Large populations of affected individuals were identified in several states, including over one million residents in Texas and hundreds of thousands in both South Carolina and Washington.
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The scope of the exposed data is extensive, covering names, tax information, financial application details, and payment card numbers. Additionally, some victims had sensitive legal documents compromised, such as birth certificates, marriage certificates, and passport numbers. This variety of data poses a significant identity theft risk to those involved, though no specific hacking organization has claimed responsibility for the intrusion at this time.
Prosper was established in 2005 as a pioneer in the peer-to-peer lending industry, connecting individual investors with people seeking personal loans. Over the last two decades, the company has facilitated 28 billion dollars in loans for millions of borrowers and expanded its services to include home equity products. This long-standing history and large customer base explain the significant number of individuals impacted by this summer’s security failure.
In response to the incident, Prosper is offering two years of complimentary identity protection services to help affected customers monitor for potential fraud. The company continues to cooperate with authorities as they investigate the full extent of the breach. Affected individuals are encouraged to remain vigilant and review the official notices provided by the firm regarding their specific data exposure.
Source: Nearly 20 Million People Affected By Data Breaches At Prosper And 700Credit