security-advisories
by Nextcloud
Source repositories
- https://github.com/nextcloud/security-advisories
- https://github.com/nextcloud/server
- https://github.com/nextcloud/android
- https://github.com/nextcloud/desktop
- https://github.com/nextcloud/ios
- https://github.com/nextcloud/spreed
- https://github.com/nextcloud/deck
- https://github.com/nextcloud/calendar
- https://github.com/nextcloud/mail
- https://github.com/nextcloud/talk-android
- https://github.com/nextcloud/notes
- https://github.com/nextcloud/text
- https://github.com/nextcloud/contacts
- https://github.com/nextcloud/richdocuments
- https://github.com/nextcloud/groupfolders
- https://github.com/nextcloud/tables
- https://github.com/nextcloud/user_oidc
- https://github.com/nextcloud/circles
- https://github.com/nextcloud/guests
CVEs (233)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2022-41882 | Med | 0.43 | 6.6 | 0.00 | Nov 11, 2022 | The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. In version 3.6.0, if a user received a malicious file share and has it synced locally or the virtual filesystem enabled and clicked a nc://open/ link it will open the default… | ||
| CVE-2025-47790 | Med | 0.42 | 6.4 | 0.00 | May 16, 2025 | Nextcloud Server is a self hosted personal cloud system. Nextcloud Server prior to 29.0.15, 30.0.9, and 31.0.3 and Nextcloud Enterprise Server prior to 26.0.13.15, 27.1.11.15, 28.0.14.6, 29.0.15, 30.0.9, and 31.0.3 have a bug with session handling. The bug caused skipping the… | ||
| CVE-2023-30539 | Med | 0.42 | 6.5 | 0.01 | Apr 17, 2023 | Nextcloud is a personal home server system. Depending on the set up tags and other workflows this issue can be used to limit access of others or being able to grant them access when there are system tag based files access control or files retention rules. It is recommended that… | ||
| CVE-2022-36074 | Med | 0.42 | 6.4 | 0.01 | Sep 15, 2022 | Nextcloud server is an open source personal cloud product. Affected versions of this package are vulnerable to Information Exposure which fails to strip the Authorization header on HTTP downgrade. This can lead to account access exposure and compromise. It is recommended that… | ||
| CVE-2022-31118 | Med | 0.42 | 6.5 | 0.01 | Aug 4, 2022 | Nextcloud server is an open source personal cloud solution. In affected versions an attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (`a-zA-Z0-9` ^ 15). It is recommended that the… | ||
| CVE-2022-31024 | Med | 0.42 | 6.5 | 0.01 | Jun 2, 2022 | richdocuments is the repository for NextCloud Collabra, the app for Nextcloud Office collaboration. Prior to versions 6.0.0, 5.0.4, and 4.2.6, a user could be tricked into working against a remote Office by sending them a federated share. richdocuments versions 6.0.0, 5.0.4 and… | ||
| CVE-2021-41233 | Med | 0.42 | 6.5 | 0.01 | Mar 10, 2022 | Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". For successful… | ||
| CVE-2021-39222 | Med | 0.42 | 6.4 | 0.01 | Nov 15, 2021 | Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the… | ||
| CVE-2021-41179 | Med | 0.42 | 6.5 | 0.01 | Oct 25, 2021 | 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… | ||
| CVE-2021-39221 | Med | 0.42 | 6.4 | 0.01 | Oct 25, 2021 | Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Contacts application prior to version 4.0.3 was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file… | ||
| CVE-2021-37631 | Med | 0.42 | 6.5 | 0.01 | Sep 7, 2021 | Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. In affected versions the Deck application didn't properly check membership of users in a Circle. This allowed other users in the… | ||
| CVE-2021-37630 | Med | 0.42 | 6.5 | 0.01 | Sep 7, 2021 | Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application allowed any user to join any "Secret Circle" without approval by the Circle owner leaking private information. It is recommended that… | ||
| CVE-2021-32728 | Med | 0.42 | 6.5 | 0.01 | Aug 18, 2021 | The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to… | ||
| CVE-2021-32676 | Med | 0.42 | 6.5 | 0.01 | Jun 16, 2021 | Nextcloud Talk is a fully on-premises audio/video and chat communication service. Password protected shared chats in Talk before version 9.0.10, 10.0.8 and 11.2.2 did not rotate the session cookie after a successful authentication event. It is recommended that the Nextcloud Talk… | ||
| CVE-2025-66551 | Med | 0.41 | 6.3 | 0.00 | Dec 5, 2025 | Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.6 and 0.9.3, a malicious user was able to create their own table and then move a column to a victims table. This vulnerability is fixed in 0.8.6 and 0.9.3. | ||
| CVE-2023-25579 | Med | 0.39 | 6.0 | 0.01 | Feb 22, 2023 | Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to… | ||
| CVE-2023-22469 | Med | 0.38 | 5.8 | 0.01 | Jan 10, 2023 | Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. When getting the reference preview for Deck cards the user has no access to, unauthorized user could eventually get the cached data of a user that… | ||
| CVE-2021-32782 | Med | 0.38 | 5.8 | 0.01 | Sep 7, 2021 | Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application is vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. Due the strict Content-Security-Policy shipped with Nextcloud, this… | ||
| CVE-2025-66550 | Med | 0.37 | 5.7 | 0.00 | Dec 5, 2025 | Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming… | ||
| CVE-2023-28645 | Med | 0.37 | 5.7 | 0.01 | Mar 31, 2023 | Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure view feature of the rich documents app can be bypassed by using unprotected internal API endpoint of the rich documents app. It is recommended that the… |
- risk 0.43cvss 6.6epss 0.00
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. In version 3.6.0, if a user received a malicious file share and has it synced locally or the virtual filesystem enabled and clicked a nc://open/ link it will open the default…
- risk 0.42cvss 6.4epss 0.00
Nextcloud Server is a self hosted personal cloud system. Nextcloud Server prior to 29.0.15, 30.0.9, and 31.0.3 and Nextcloud Enterprise Server prior to 26.0.13.15, 27.1.11.15, 28.0.14.6, 29.0.15, 30.0.9, and 31.0.3 have a bug with session handling. The bug caused skipping the…
- risk 0.42cvss 6.5epss 0.01
Nextcloud is a personal home server system. Depending on the set up tags and other workflows this issue can be used to limit access of others or being able to grant them access when there are system tag based files access control or files retention rules. It is recommended that…
- risk 0.42cvss 6.4epss 0.01
Nextcloud server is an open source personal cloud product. Affected versions of this package are vulnerable to Information Exposure which fails to strip the Authorization header on HTTP downgrade. This can lead to account access exposure and compromise. It is recommended that…
- risk 0.42cvss 6.5epss 0.01
Nextcloud server is an open source personal cloud solution. In affected versions an attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (`a-zA-Z0-9` ^ 15). It is recommended that the…
- risk 0.42cvss 6.5epss 0.01
richdocuments is the repository for NextCloud Collabra, the app for Nextcloud Office collaboration. Prior to versions 6.0.0, 5.0.4, and 4.2.6, a user could be tricked into working against a remote Office by sending them a federated share. richdocuments versions 6.0.0, 5.0.4 and…
- risk 0.42cvss 6.5epss 0.01
Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". For successful…
- risk 0.42cvss 6.4epss 0.01
Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the…
- risk 0.42cvss 6.5epss 0.01
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…
- risk 0.42cvss 6.4epss 0.01
Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Contacts application prior to version 4.0.3 was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file…
- risk 0.42cvss 6.5epss 0.01
Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. In affected versions the Deck application didn't properly check membership of users in a Circle. This allowed other users in the…
- risk 0.42cvss 6.5epss 0.01
Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application allowed any user to join any "Secret Circle" without approval by the Circle owner leaking private information. It is recommended that…
- risk 0.42cvss 6.5epss 0.01
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to…
- risk 0.42cvss 6.5epss 0.01
Nextcloud Talk is a fully on-premises audio/video and chat communication service. Password protected shared chats in Talk before version 9.0.10, 10.0.8 and 11.2.2 did not rotate the session cookie after a successful authentication event. It is recommended that the Nextcloud Talk…
- risk 0.41cvss 6.3epss 0.00
Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.6 and 0.9.3, a malicious user was able to create their own table and then move a column to a victims table. This vulnerability is fixed in 0.8.6 and 0.9.3.
- risk 0.39cvss 6.0epss 0.01
Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to…
- risk 0.38cvss 5.8epss 0.01
Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. When getting the reference preview for Deck cards the user has no access to, unauthorized user could eventually get the cached data of a user that…
- risk 0.38cvss 5.8epss 0.01
Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application is vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. Due the strict Content-Security-Policy shipped with Nextcloud, this…
- risk 0.37cvss 5.7epss 0.00
Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming…
- risk 0.37cvss 5.7epss 0.01
Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure view feature of the rich documents app can be bypassed by using unprotected internal API endpoint of the rich documents app. It is recommended that the…
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