CVE-2025-66550

CVE-2025-66550CVE-2025-66550

nextcloud / calendar

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.

Scoring

CVSS 5.7 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Last modified2026-10-18
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.