TYPO3 Core

TYPO3 v10.4.2

Reproducible when these conditions are all true:

1. I am logged into the backend as a user without the correct access privileges
2. I edit a content element with a rich text field
3. The field processing is configured to "detectbrokenlinks" or "default" (which includes "detectbrokenlinks")
4. The rich text field contains a link to a folder I don't have access to

To reproduce:

1. Install the Introduction Package
2. Remove all file mounts from the user "simple_editor"
3. SU to the "simple_editor" user
4. Go to the Content Examples -> Text -> Rich Text (uid=65)
5. Edit the content element "Link" (uid=23)

Exception message attached.