What is credential stuffing in insurance quoting?

Why quote flows get hit first

Quote forms are public, high-traffic, and built for conversion, which means minimal friction. An attacker can test thousands of credential pairs per hour without triggering the scrutiny a login page would get. Each success is scored: does this account have saved quotes, prior policies, or agent permissions? The hits get sorted and sold or used within days.

How it differs from application stuffing

Application stuffing creates new fake applications; credential stuffing hijacks real accounts. The business impact differs too. Stuffing pollutes your funnel metrics and underwriting queue. Credential stuffing hands attackers legitimate access, which enables ghost-broker schemes, unauthorized policy changes, and claims filed under someone else's identity.

The signals that give it away

Look for login and quote-start velocity far above human norms, high failure rates followed by sudden success bursts, traffic from datacenter IP ranges and anonymizing infrastructure, and credential pairs tried across many accounts in sequence rather than one account in depth. Real users mistype; stuffing tools rotate.

What actually stops it

Rate limiting alone just slows the inevitable. Effective defense layers device and behavior signals: block the automation at the quote form before it reaches authentication, challenge the gray zone with step-up verification, and monitor for the post-login behaviors that mark a taken-over account, like rapid beneficiary or bank-detail changes. The goal is to make your quote flow the expensive target, not the easy one.