# What is Guest user?

> A guest user is the Salesforce user that represents unauthenticated visitors to a public site or Experience Cloud page. Whatever the guest user's profile allows can be reached without logging in, which makes its object access a common source of accidental data exposure.

Source: https://synconai360.com/glossary/guest-user

## Why it matters

Guest user exposure is one of the most serious and most overlooked Salesforce security risks, because it is invisible to internal users.

## In SyncOnAI 360

SyncOnAI 360 checks guest user object access in every audit, with the grants behind any finding.

## Related terms

- [Permission set](https://synconai360.com/glossary/permission-set)
- [Salesforce profile](https://synconai360.com/glossary/salesforce-profile)