CVEvulnerability
CVE-2025-66546
3.3 LOW
Official page ↗
- Status
- Analyzed
- Published
- 2025-12-05
- Last modified
- 2026-10-18
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.3 LOW — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-639
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.
Affected configurations
• nextcloud calendar (>= 4.0.0 < 4.7.19)
• nextcloud calendar (>= 5.0.0 < 5.5.6)
• nextcloud calendar 6.0.0
Related
Weakness · CWE (1)
- CWE-639 Authorization Bypass Through User-Controlled Key weakness
References
- https://github.com/nextcloud/calendar/commit/f41650c3681fc4a4130eb883f5c0899c011326b3 Patch
- https://github.com/nextcloud/calendar/pull/7537 Issue Tracking
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7x2j-2674-fj95 Patch, Vendor Advisory
- https://hackerone.com/reports/3275810 Issue Tracking, Vendor Advisory