How can hackers bypass MFA and SSO if these are supposed to protect us?

Multi-factor authentication (MFA) and single sign-on (SSO) are like security guards at the front door of your building. They check IDs and verify people before letting them in. But this SharePoint vulnerability is like a hidden tunnel that goes directly into the building, completely avoiding the front door security. The hackers don't need to present credentials or pass through your authentication systems because they're exploiting a flaw in how SharePoint processes certain data. Your security measures are still important, but they can't protect against attacks that don't use the normal entry points.