{"id":"UBUNTU-CVE-2025-66549","details":"Nextcloud Desktop is the desktop sync client for Nextcloud. Prior to 3.16.5, when trying to manually lock a file inside an end-to-end encrypted directory, the path of the file was sent to the server unencrypted, making it possible for administrators to see it in log files. This vulnerability is fixed in 3.16.5.","modified":"2026-04-22T16:09:24.283112Z","published":"2025-12-05T18:15:00Z","upstream":["CVE-2025-66549"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-66549"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-66549"},{"type":"REPORT","url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw"},{"type":"REPORT","url":"https://github.com/nextcloud/desktop/pull/8330"},{"type":"REPORT","url":"https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6"},{"type":"REPORT","url":"https://hackerone.com/reports/3159877"}],"affected":[{"package":{"name":"nextcloud-desktop","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/nextcloud-desktop@2.6.2-1build1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.3-1","2.6.0-1","2.6.1-1","2.6.1-2","2.6.2-1","2.6.2-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"caja-nextcloud","binary_version":"2.6.2-1build1"},{"binary_name":"dolphin-nextcloud","binary_version":"2.6.2-1build1"},{"binary_name":"libnextcloudsync0","binary_version":"2.6.2-1build1"},{"binary_name":"nautilus-nextcloud","binary_version":"2.6.2-1build1"},{"binary_name":"nemo-nextcloud","binary_version":"2.6.2-1build1"},{"binary_version":"2.6.2-1build1","binary_name":"nextcloud-desktop"},{"binary_name":"nextcloud-desktop-cmd","binary_version":"2.6.2-1build1"},{"binary_name":"nextcloud-desktop-common","binary_version":"2.6.2-1build1"},{"binary_name":"nextcloud-desktop-l10n","binary_version":"2.6.2-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66549.json"}},{"package":{"name":"nextcloud-desktop","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nextcloud-desktop@3.4.2-1ubuntu1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.3-0ubuntu1","3.3.5-1","3.3.5-1ubuntu1","3.4.2-1","3.4.2-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"caja-nextcloud","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"dolphin-nextcloud","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"libnextcloudsync0","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"nautilus-nextcloud","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"nemo-nextcloud","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"nextcloud-desktop","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"nextcloud-desktop-cmd","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"nextcloud-desktop-common","binary_version":"3.4.2-1ubuntu1"},{"binary_name":"nextcloud-desktop-l10n","binary_version":"3.4.2-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66549.json"}},{"package":{"name":"nextcloud-desktop","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nextcloud-desktop@3.11.0-1.1build4?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.9.0-1","3.10.0-1","3.11.0-1","3.11.0-1.1build3","3.11.0-1.1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"caja-nextcloud","binary_version":"3.11.0-1.1build4"},{"binary_name":"dolphin-nextcloud","binary_version":"3.11.0-1.1build4"},{"binary_name":"libnextcloudsync0t64","binary_version":"3.11.0-1.1build4"},{"binary_name":"nautilus-nextcloud","binary_version":"3.11.0-1.1build4"},{"binary_name":"nemo-nextcloud","binary_version":"3.11.0-1.1build4"},{"binary_name":"nextcloud-desktop","binary_version":"3.11.0-1.1build4"},{"binary_name":"nextcloud-desktop-cmd","binary_version":"3.11.0-1.1build4"},{"binary_name":"nextcloud-desktop-common","binary_version":"3.11.0-1.1build4"},{"binary_version":"3.11.0-1.1build4","binary_name":"nextcloud-desktop-l10n"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66549.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}