CVE-2025-66546

Published December 5th, 2025

View on NVD ↗

CVSS v3

3.3

LOW

CVSS v2

N/A

Affected

PROJECTS

Description

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.19, 5.5.6, and 6.0.1, the calendar app allowed blindly booking appointments with a squential ID without known the appointment token. This vulnerability is fixed in 4.7.19, 5.5.6, and 6.0.1.

nextcloud/security-advisories

👮 Security advisories of Nextcloud

GitHub

nextcloud/calendar

📆 Calendar app for Nextcloud

GitHub

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