[HIGH] SilverStripe Folders migrated from 3.x may be unsafe to upload to

PKSA-rfdt-9jwp-6pz9 CVE-2020-9280 GHSA-592m-4533-rxq9

Affected package: silverstripe/userforms

Affected version: >=5.0.0,<5.4.2

Reported by:
GitHub