| 概要 | Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, with the knowledge of other users’ principal URL an attacker could possibly send a request to gain full access to their calendar. Therefore, the attacker must be an authenticated user. This is because of improper authorization controls in the backend of the calendar. If the attacker had access to the calendar, they would be able to view and modify it. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17, 27.1.11.26, 26.0.13.26, 25.0.13.29, 24.0.12.34, 23.0.12.35, 22.2.10.39, or 21.0.9.23 |
|---|---|
| 公表日 | 2026年6月2日4:16 |
| 登録日 | 2026年6月3日4:14 |
| 最終更新日 | 2026年6月4日2:11 |
| CVSS3.1 : HIGH | |
| スコア | 8.1 |
|---|---|
| ベクター | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| 攻撃元区分(AV) | ネットワーク |
| 攻撃条件の複雑さ(AC) | 低 |
| 攻撃に必要な特権レベル(PR) | 低 |
| 利用者の関与(UI) | 不要 |
| 影響の想定範囲(S) | 変更なし |
| 機密性への影響(C) | 高 |
| 完全性への影響(I) | 高 |
| 可用性への影響(A) | なし |
| 構成1 | 以上 | 以下 | より上 | 未満 | |
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* | 32.0.0 | 32.0.9 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* | 33.0.0 | 33.0.3 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 21.0.0 | 21.0.9.23 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 22.0.0 | 22.2.10.39 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 23.0.0 | 23.0.12.35 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 24.0.0 | 24.0.12.34 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 25.0.0 | 25.0.13.29 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 26.0.0 | 26.0.13.26 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 27.0.0 | 27.1.11.26 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 28.0.0 | 28.0.14.17 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 29.0.0 | 29.0.16.16 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 30.0.0 | 30.0.17.9 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 31.0.0 | 31.0.14.5 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 32.0.0 | 32.0.9 | |||
| cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* | 33.0.0 | 33.0.3 | |||