SolarWinds cyberattack was one of the largest attacks of the century in which attackers used the Golden SAML attack in post-breach exploitation to affect thousands of organizations all over the world including the United States government for deploying malicious code into Orion IT management and monitoring software.  After the massive cyberattack, CISA recommended hybrid environment organizations to move to a cloud identity system such as Entra ID. However, a new technique dubbed Silver SAML has been discovered which could bypass security recommendations and exploit Entra ID using applications.

Source: GBHackers