CVE-2021-41179— Nextcloud 安全漏洞
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I. CVE-2021-41179の基本情報
脆弱性情報
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脆弱性タイトル
Two-Factor Authentication not enforced for pages marked as public
ソース: NVD (National Vulnerability Database)
脆弱性説明
Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn't authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.
ソース: NVD (National Vulnerability Database)
CVSS情報
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
ソース: NVD (National Vulnerability Database)
脆弱性タイプ
认证中关键步骤缺失
ソース: NVD (National Vulnerability Database)
脆弱性タイトル
Nextcloud 安全漏洞
ソース: CNNVD (China National Vulnerability Database)
脆弱性説明
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud 存在安全漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题。
ソース: CNNVD (China National Vulnerability Database)
CVSS情報
N/A
ソース: CNNVD (China National Vulnerability Database)
脆弱性タイプ
N/A
ソース: CNNVD (China National Vulnerability Database)
影響を受ける製品
| ベンダー | プロダクト | 影響を受けるバージョン | CPE | 購読 |
|---|---|---|---|---|
| nextcloud | security-advisories | < 20.0.13 | - |
II. CVE-2021-41179の公開POC
| # | POC説明 | ソースリンク | Shenlongリンク |
|---|
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公開POCは見つかりませんでした。
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- https://github.com/nextcloud/server/pull/28725x_refsource_MISC
- https://hackerone.com/reports/1322865x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-41179
Same Patch Batch · nextcloud · 2021-10-25 · 8 CVEs total
| CVE-2021-41178 | 8.8 HIGH | File Traversal affecting SVG files on Nextcloud Server |
| CVE-2021-39225 | 8.1 HIGH | Missing permission check on Deck API |
| CVE-2021-41177 | 8.1 HIGH | Rate-limits not working on instances without configured memory cache backend |
| CVE-2021-39221 | 6.4 MEDIUM | XSS in Contacts |
| CVE-2021-39223 | 4.8 MEDIUM | File path disclosure of shared files in Richdocuments application |
| CVE-2021-39220 | 3.5 LOW | Bypass of image blocking in Nextcloud Mail |
| CVE-2021-39224 | 3.5 LOW | File path disclosure of shared files in OfficeOnline application |
IV. 関連脆弱性
同じ製品: security-advisories
- CVE-2026-28272
Kiteworks Email Protection Gateway has a Cross-site Scriptin - CVE-2026-28271
Kiteworks Core is vulnerable to Server-Side Request Forgery - CVE-2026-28270
Kiteworks Core has an Unrestricted Upload of File with Dange - CVE-2026-28269
Kiteworks Core has an OS Command Injection - CVE-2025-66558
Nextcloud Twofactor WebAuthn app was updated based on public
同じベンダー: nextcloud
- CVE-2025-66558
Nextcloud Twofactor WebAuthn app was updated based on public - CVE-2025-66556
Nextcloud talk allows participants to blindly delete poll dr - CVE-2025-66554
Nextcloud Contacts vulnerable to Stored XSS in contacts app - CVE-2025-66549
Nextcloud Desktop discloses information when attempting to l - CVE-2025-66545
Nextcloud Groupfolders users with read-only permissions for
V. CVE-2021-41179へのコメント
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