Single Sign-On (SSO) is a mission-critical solution for authentication, improving security, ease of access for users, and IT productivity. By letting users log on once to utilize multiple applications, SSO cuts down password-centric risks like the use of weak passwords and phishing. SSO also facilitates unified identity management with improved onboarding and offboarding, and automated enforcement of security policies. But since SSO centralizes authentication, it also becomes a point of vulnerability for cyber attacks. In order to restrict risks, organizations must implement Multi-Factor Authentication (MFA), apply role-based access controls (RBAC), and make use of real-time security analytics to prevent and react to possible threats in advance.