Prosper Marketplace Cybersecurity Breach Exposes Data of 17 Million Users, Sparks Renewed Fintech Security Concerns

Prosper Marketplace has confirmed a major cybersecurity breach that compromised the personal data of over 17 million users, underscoring the persistent challenges faced by financial institutions in protecting sensitive consumer information.

According to the peer-to-peer lending firm, an unauthorized actor gained access to internal systems earlier this month by exploiting compromised administrative credentials. While Prosper emphasized that no bank account details or passwords were affected, exposed data included names, Social Security numbers, and income information—posing serious identity theft risks and fresh security challenges for financial sector CISOs.

The company said it swiftly contained the breach and initiated a full-scale investigation with the help of external cybersecurity experts. Prosper also began notifying affected users and regulators while offering free credit monitoring to those impacted. Though its financial and lending operations remained secure, the incident highlights how stolen or misused credentials continue to endanger fintech organizations.

Prosper’s incident FAQ revealed that the company detected unauthorized system access in early September and immediately took affected servers offline to prevent further compromise. Investigators discovered that an attacker used administrative credentials to reach a database containing both

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