Sensitive data exposure can occur through insecure networking practices like binding services to all interfaces via 0.0.0.0 which opens them to unintended networks exponentially increasing attack surface, as well as through unprotected client alerts that display sensitive data like credentials or personal information directly to users without access controls; to prevent unauthorized exposure, network services should bind only to specific required IPs and interfaces avoiding 0.0.0.0 to limit exposure, sensitive data should never be passed to client-facing alerts but instead handled securely via server-side logging, and any displayed data should be validated and sanitized to avoid unintended leakage - restricting services and avoiding unprotected UI display of secrets reduces the risk of sensitive data exposure through limiting network exposure and eliminating uncontrolled client output.