This update for nextcloud fixes the following issues:
nextcloud version 20.0.0 fix some security issues:
NC-SA-2020-037 PIN for passwordless WebAuthm is asked for but not verified
NC-SA-2020-033 (CVE-2020-8228) Missing rate limit on signup page
NC-SA-2020-029 (CVE-2020-8233, boo#1177346) Re-Sharing allows increase of privileges
NC-SA-2020-026 Passowrd of share by mail is not hashed when given on the create share call
NC-SA-2020-023 Increase random used for encryption
Update to 19.0.3
Update to 19.0.2
Update to 19.0.1
Update to 19.0.0