Server
by Nextcloud
Source repositories
CVEs (195)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2025-64011 | Med | 0.28 | 4.3 | 0.00 | Dec 12, 2025 | Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint. Any authenticated user can access previews of arbitrary files belonging to other users by manipulating the fileId parameter. This allows unauthorized disclosure of… | ||
| CVE-2021-32657 | Med | 0.28 | 4.3 | 0.02 | Jun 1, 2021 | Nextcloud Server is a Nextcloud package that handles data storage. In versions of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. This would disallow administrators to administrate users on the Nextcloud… | ||
| CVE-2020-8122 | Med | 0.28 | 4.3 | 0.01 | Feb 4, 2020 | A missing check in Nextcloud Server 14.0.3 could give recipient the possibility to extend the expiration date of a share they received. | ||
| CVE-2020-8119 | Med | 0.28 | 4.3 | 0.01 | Feb 4, 2020 | Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery app. | ||
| CVE-2020-8117 | Med | 0.28 | 4.3 | 0.01 | Feb 4, 2020 | Improper preservation of permissions in Nextcloud Server 14.0.3 causes the event details to be leaked when sharing a non-public event. | ||
| CVE-2019-15616 | Med | 0.28 | 4.3 | 0.01 | Feb 4, 2020 | Dangling remote share attempts in Nextcloud 16 allow a DNS pollution when running long. | ||
| CVE-2019-5449 | Med | 0.28 | 4.3 | 0.01 | Jul 30, 2019 | A missing check in the Nextcloud Server prior to version 15.0.1 causes leaking of calendar event names when adding or modifying confidential or private events. | ||
| CVE-2018-3762 | Med | 0.28 | 4.3 | 0.01 | Jul 5, 2018 | Nextcloud Server before 12.0.8 and 13.0.3 suffers from improper checks of dropped permissions for incoming shares allowing a user to still request previews for files it should not have access to. | ||
| CVE-2017-0894 | Med | 0.28 | 4.3 | 0.01 | May 8, 2017 | 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-2017-0888 | Med | 0.28 | 4.3 | 0.02 | Apr 5, 2017 | Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Content-Spoofing vulnerability in the "files" app. The top navigation bar displayed in the files list contained partially user-controllable input leading to a potential misrepresentation of information. | ||
| CVE-2017-0887 | Med | 0.28 | 4.3 | 0.01 | Apr 5, 2017 | Nextcloud Server before 9.0.55 and 10.0.2 suffers from a bypass in the quota limitation. Due to not properly sanitizing values provided by the `OC-Total-Length` HTTP header an authenticated adversary may be able to exceed their configured user quota. Thus using more space than… | ||
| CVE-2017-0885 | Med | 0.28 | 4.3 | 0.01 | Apr 5, 2017 | Nextcloud Server before 9.0.55 and 10.0.2 suffers from a error message disclosing existence of file in write-only share. Due to an error in the application logic an adversary with access to a write-only share may enumerate the names of existing files and subfolders by comparing… | ||
| CVE-2017-0884 | Med | 0.28 | 4.3 | 0.01 | Apr 5, 2017 | Nextcloud Server before 9.0.55 and 10.0.2 suffers from a creation of folders in read-only folders despite lacking permissions issue. Due to a logical error in the file caching layer an authenticated adversary is able to create empty folders inside a shared folder. Note that this… | ||
| CVE-2016-9464 | Med | 0.28 | 4.3 | 0.02 | Mar 28, 2017 | 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… | ||
| CVE-2016-9462 | Med | 0.28 | 4.3 | 0.02 | Mar 28, 2017 | Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying restore privileges when restoring a file. The restore capability of Nextcloud/ownCloud was not verifying whether a user has only read-only access to a share. Thus a user with read-only… | ||
| CVE-2016-9461 | Med | 0.28 | 4.3 | 0.02 | Mar 28, 2017 | Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a… | ||
| CVE-2020-8150 | Med | 0.27 | 4.1 | 0.00 | Nov 9, 2020 | A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files. | ||
| CVE-2021-32655 | Low | 0.23 | 3.5 | 0.01 | Jun 1, 2021 | Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the… | ||
| CVE-2017-0895 | Low | 0.23 | 3.5 | 0.01 | May 8, 2017 | 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. | ||
| CVE-2017-0892 | Low | 0.23 | 3.5 | 0.01 | May 8, 2017 | Nextcloud Server before 11.0.3 is vulnerable to an improper session handling allowed an application specific password without permission to the files access to the users file. |
- risk 0.28cvss 4.3epss 0.00
Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint. Any authenticated user can access previews of arbitrary files belonging to other users by manipulating the fileId parameter. This allows unauthorized disclosure of…
- risk 0.28cvss 4.3epss 0.02
Nextcloud Server is a Nextcloud package that handles data storage. In versions of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. This would disallow administrators to administrate users on the Nextcloud…
- risk 0.28cvss 4.3epss 0.01
A missing check in Nextcloud Server 14.0.3 could give recipient the possibility to extend the expiration date of a share they received.
- risk 0.28cvss 4.3epss 0.01
Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery app.
- risk 0.28cvss 4.3epss 0.01
Improper preservation of permissions in Nextcloud Server 14.0.3 causes the event details to be leaked when sharing a non-public event.
- risk 0.28cvss 4.3epss 0.01
Dangling remote share attempts in Nextcloud 16 allow a DNS pollution when running long.
- risk 0.28cvss 4.3epss 0.01
A missing check in the Nextcloud Server prior to version 15.0.1 causes leaking of calendar event names when adding or modifying confidential or private events.
- risk 0.28cvss 4.3epss 0.01
Nextcloud Server before 12.0.8 and 13.0.3 suffers from improper checks of dropped permissions for incoming shares allowing a user to still request previews for files it should not have access to.
- risk 0.28cvss 4.3epss 0.01
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.
- risk 0.28cvss 4.3epss 0.02
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Content-Spoofing vulnerability in the "files" app. The top navigation bar displayed in the files list contained partially user-controllable input leading to a potential misrepresentation of information.
- risk 0.28cvss 4.3epss 0.01
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a bypass in the quota limitation. Due to not properly sanitizing values provided by the `OC-Total-Length` HTTP header an authenticated adversary may be able to exceed their configured user quota. Thus using more space than…
- risk 0.28cvss 4.3epss 0.01
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a error message disclosing existence of file in write-only share. Due to an error in the application logic an adversary with access to a write-only share may enumerate the names of existing files and subfolders by comparing…
- risk 0.28cvss 4.3epss 0.01
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a creation of folders in read-only folders despite lacking permissions issue. Due to a logical error in the file caching layer an authenticated adversary is able to create empty folders inside a shared folder. Note that this…
- risk 0.28cvss 4.3epss 0.02
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…
- risk 0.28cvss 4.3epss 0.02
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying restore privileges when restoring a file. The restore capability of Nextcloud/ownCloud was not verifying whether a user has only read-only access to a share. Thus a user with read-only…
- risk 0.28cvss 4.3epss 0.02
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a…
- risk 0.27cvss 4.1epss 0.00
A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.
- risk 0.23cvss 3.5epss 0.01
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the…
- risk 0.23cvss 3.5epss 0.01
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.
- risk 0.23cvss 3.5epss 0.01
Nextcloud Server before 11.0.3 is vulnerable to an improper session handling allowed an application specific password without permission to the files access to the users file.
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