Feed/CVE-2025-66550
CVE-2025-66550MEDIUMCVSS 5.7

CVE-2025-66550

Published Dec 5, 2025·Updated Jun 17, 2026

NVD Description

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This vulnerability is fixed in 4.7.17 and 5.2.4.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

References

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