Vulnerabilities (CVE)

Filtered by vendor Nextcloud Subscribe
Total 322 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2025-47793 1 Nextcloud 2 Group Folders, Nextcloud Server 2025-09-08 N/A 4.3 MEDIUM
Nextcloud Server is a self hosted personal cloud system, and the Nextcloud Groupfolders app provides admin-configured folders shared by everyone in a group or team. In Nextcloud Server prior to 30.0.2, 29.0.9, and 28.0.1, Nextcloud Enterprise Server prior to 30.0.2 and 29.0.9, and Nextcloud Groupfolders app prior to 18.0.3, 17.0.5, and 16.0.11, the absence of quota checking on attachments allowed logged-in users to upload files exceeding the group folder quota. Nextcloud Server versions 30.0.2 and 29.0.9, Nextcloud Enterprise Server versions 30.0.2, 29.0.9, or 28.0.12, and Nextcloud Groupfolders app 18.0.3, 17.0.5, and 16.0.11 fix the issue. No known workarounds are available.
CVE-2025-47792 1 Nextcloud 1 Desktop 2025-09-08 N/A 5.0 MEDIUM
Nextcloud Desktop is the desktop sync client for Nextcloud. In versions of Nextcloud Desktop prior to 3.15, 3rdparty applications already installed on a user machine can create link shares for almost all data via the socket API. These shares can then be easily sent off to an external service. Nextcloud Desktop fixes the issue in version 3.15. No known workarounds are available.
CVE-2024-52520 1 Nextcloud 1 Nextcloud Server 2025-09-05 N/A 5.7 MEDIUM
Nextcloud Server is a self hosted personal cloud system. Due to a pre-flighted HEAD request, the link reference provider could be tricked into downloading bigger websites than intended, to find open-graph data. It is recommended that the Nextcloud Server is upgraded to 28.0.10 or 29.0.7 and Nextcloud Enterprise Server is upgraded to 27.1.11.8, 28.0.10 or 29.0.7.
CVE-2024-52509 1 Nextcloud 1 Mail 2025-09-04 N/A 3.5 LOW
Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. The Nextcloud mail app incorrectly allowed attaching shared files without download permissions as attachments. This allowed users to send them the files to themselves and then downloading it from their mail clients. It is recommended that the Nextcloud Mail is upgraded to 2.2.10, 3.6.2 or 3.7.2.
CVE-2024-52510 1 Nextcloud 1 Desktop 2025-08-28 N/A 4.2 MEDIUM
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. The Desktop client did not stop with an error but allowed by-passing the signature validation, if a manipulated server sends an empty initial signature. It is recommended that the Nextcloud Desktop client is upgraded to 3.14.2 or later.
CVE-2024-52512 1 Nextcloud 1 User Oidc 2025-08-15 N/A 3.3 LOW
user_oidc app is an OpenID Connect user backend for Nextcloud. A malicious user could send a malformed login link that would redirect the user to a provided URL after successfully authenticating. It is recommended that the Nextcloud User OIDC app is upgraded to 6.1.0.
CVE-2024-37312 1 Nextcloud 1 User Oidc 2025-08-14 N/A 6.3 MEDIUM
user_oidc app is an OpenID Connect user backend for Nextcloud. Missing access control on the ID4me endpoint allows an attacker to register an account eventually getting access to data that is available to all registered users. It is recommended that the OpenID Connect user backend is upgraded to 3.0.0 (Nextcloud 20-23), 4.0.0 (Nexcloud 24) or 5.0.0 (Nextcloud 25-28).
CVE-2024-37886 1 Nextcloud 1 User Oidc 2025-08-14 N/A 5.4 MEDIUM
user_oidc app is an OpenID Connect user backend for Nextcloud. An attacker could potentially trick the app into accepting a request that is not signed by the correct server. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.5, 2.0.0, 3.0.0, 4.0.0 or 5.0.0.
CVE-2024-30247 1 Nextcloud 1 Nextcloudpi 2025-05-07 N/A 10.0 CRITICAL
NextcloudPi is a ready to use image for Virtual Machines, Raspberry Pi, Odroid HC1, Rock64 and other boards. A command injection vulnerability in NextCloudPi allows command execution as the root user via the NextCloudPi web-panel. Due to a security misconfiguration this can be used by anyone with access to NextCloudPi web-panel, no authentication is required. It is recommended that the NextCloudPi is upgraded to 1.53.1.
CVE-2017-0891 1 Nextcloud 1 Nextcloud Server 2025-04-20 3.5 LOW 5.4 MEDIUM
Nextcloud Server before 9.0.58 and 10.0.5 and 11.0.3 are vulnerable to an inadequate escaping of error messages leading to XSS vulnerabilities in multiple components.
CVE-2016-9465 2 Nextcloud, Owncloud 2 Nextcloud Server, Owncloud 2025-04-20 3.5 LOW 5.4 MEDIUM
Nextcloud Server before 10.0.1 & ownCloud Server before 9.0.6 and 9.1.2 suffer from Stored XSS in CardDAV image export. The CardDAV image export functionality as implemented in Nextcloud/ownCloud allows the download of images stored within a vCard. Due to not performing any kind of verification on the image content this is prone to a stored Cross-Site Scripting attack.
CVE-2017-0883 1 Nextcloud 1 Nextcloud Server 2025-04-20 5.5 MEDIUM 6.4 MEDIUM
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.
CVE-2017-0894 1 Nextcloud 1 Nextcloud Server 2025-04-20 4.3 MEDIUM 4.3 MEDIUM
Nextcloud Server before 11.0.3 is vulnerable to disclosure of valid share tokens for public calendars due to a logical error. Thus granting an attacker potentially access to publicly shared calendars without knowing the share token.
CVE-2016-9464 1 Nextcloud 1 Nextcloud Server 2025-04-20 4.0 MEDIUM 4.3 MEDIUM
Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.
CVE-2016-9459 2 Nextcloud, Owncloud 2 Nextcloud Server, Owncloud 2025-04-20 4.3 MEDIUM 6.1 MEDIUM
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are vulnerable to a log pollution vulnerability potentially leading to a local XSS. The download log functionality in the admin screen is delivering the log in JSON format to the end-user. The file was delivered with an attachment disposition forcing the browser to download the document. However, Firefox running on Microsoft Windows would offer the user to open the data in the browser as an HTML document. Thus any injected data in the log would be executed.
CVE-2016-9460 2 Nextcloud, Owncloud 2 Nextcloud, Owncloud 2025-04-20 5.0 MEDIUM 5.3 MEDIUM
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are vulnerable to a content-spoofing attack in the files app. The location bar in the files app was not verifying the passed parameters. An attacker could craft an invalid link to a fake directory structure and use this to display an attacker-controlled error message to the user.
CVE-2016-9463 2 Nextcloud, Owncloud 2 Nextcloud Server, Owncloud 2025-04-20 6.8 MEDIUM 8.1 HIGH
Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.
CVE-2017-0890 1 Nextcloud 1 Nextcloud Server 2025-04-20 3.5 LOW 5.4 MEDIUM
Nextcloud Server before 11.0.3 is vulnerable to an inadequate escaping leading to a XSS vulnerability in the search module. To be exploitable a user has to write or paste malicious content into the search dialogue.
CVE-2017-0886 1 Nextcloud 1 Nextcloud Server 2025-04-20 4.0 MEDIUM 6.5 MEDIUM
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Denial of Service attack. Due to an error in the application logic an authenticated adversary may trigger an endless recursion in the application leading to a potential Denial of Service.
CVE-2017-0895 1 Nextcloud 1 Nextcloud Server 2025-04-20 3.5 LOW 3.5 LOW
Nextcloud Server before 10.0.4 and 11.0.2 are vulnerable to disclosure of calendar and addressbook names to other logged-in users. Note that no actual content of the calendar and addressbook has been disclosed.