NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, when two server are registered as trusted servers for each other and successfully exchanged the share secrets, the malicious server could modify or delete VCards in the system addressbook on the origin server. This would impact the available and shown information in certain places, such as the user search and avatar menu. If a manipulated user modifies their own data in the personal settings the entry is fixed again. Nextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. A workaround is available. Remove all trusted servers in the "Administration" > "Sharing" settings `…/index.php/settings/admin/sharing`. Afterwards, trigger a recreation of the local system addressbook with the following `occ dav:sync-system-addressbook`.
総合評価: CVE-2023-35927 は中リスク（48.3/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.77%、51 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-23 | 0.64% | 0.77% | +0.13% |
| 2 | 2026-06-15 | 0.18% | 0.64% | +0.46% |
| 3 | 2026-03-04 | — | 0.18% | — |
EPSS の全履歴 （全 29 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.6 | 3.1 | HIGH |
|
2.3 | 4.7 | [email protected] |
| 8.1 | 3.1 | HIGH |
|
2.8 | 5.2 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| nextcloud | nextcloud_server | >= 16.0.0, < 19.0.13.9 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 20.0.0, < 20.0.14.14 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 21.0.0, < 21.0.9.12 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 22.0.0, < 22.2.10.12 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 23.0.0, < 23.0.12.7 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 24.0.0, < 24.0.12.2 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 25.0.0, < 25.0.7 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* |
| nextcloud | nextcloud_server | >= 25.0.0, < 25.0.7 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| nextcloud | nextcloud_server | >= 26.0.0, < 26.0.2 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* |
| nextcloud | nextcloud_server | >= 26.0.0, < 26.0.2 | cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87 | Vendor Advisory |
| https://github.com/nextcloud/server/pull/38247 | Issue Tracking |
| https://hackerone.com/reports/1976754 | Permissions Required |