Nextcloud 19.0.1 fixes vulnerabilities present in 19.0.0 , please update the Fedora 33 package to the latest release.
In the meantime 19.0.3 has been released. Any update on this? Let me know if I can help.
FEDORA-2020-050aaa14f7 has been submitted as an update to Fedora 33. https://bodhi.fedoraproject.org/updates/FEDORA-2020-050aaa14f7
FEDORA-2020-050aaa14f7 has been pushed to the Fedora 33 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-050aaa14f7`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-050aaa14f7
See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2020-050aaa14f7 has been pushed to the Fedora 33 stable repository.
If problem still persists, please make note of it in this bug report.