The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer.
It was discovered that Nextcloud Desktop Client did not validate URLs.
A remote attacker could entice a user to connect to a malicious Nextcloud server to cause the execution of arbitrary commands with the privileges of the user running the Nextcloud Desktop Client application.
There is no known workaround at this time.
All Nextcloud Desktop Client users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/nextcloud-client-3.1.3"