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-2021-41166 | Med | 0.28 | 4.3 | 0.01 | Jan 26, 2022 | The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may… | ||
| CVE-2021-32748 | Med | 0.28 | 4.3 | 0.01 | Jul 27, 2021 | Nextcloud Richdocuments in an open source self hosted online office. Nextcloud uses the WOPI ("Web Application Open Platform Interface") protocol to communicate with the Collabora Editor, the communication between these two services was not protected by a credentials or IP… | ||
| CVE-2021-32707 | Med | 0.28 | 4.3 | 0.01 | Jul 12, 2021 | Nextcloud Mail is a mail app for Nextcloud. In versions prior to 1.9.6, the Nextcloud Mail application does not, by default, render images in emails to not leak the read state. The privacy filter failed to filter images with a `background-image` CSS attribute. Note that the… | ||
| 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-2023-25820 | Med | 0.27 | 4.2 | 0.00 | Mar 22, 2023 | Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform, and Nextcloud Enterprise Server is the enterprise version of the file server software. In Nextcloud Server versions 25.0.x prior to 25.0.5 and versions 24.0.x prior to 24.0.10 as… | ||
| CVE-2021-32694 | Med | 0.27 | 4.1 | 0.01 | Jun 17, 2021 | Nextcloud Android app is the Android client for Nextcloud. In versions prior to 3.15.1, a malicious application on the same device is possible to crash the Nextcloud Android Client due to an uncaught exception. The vulnerability is patched in version 3.15.1. | ||
| CVE-2022-39364 | Med | 0.26 | 4.0 | 0.01 | Oct 27, 2022 | Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. In Nextcloud Server prior to versions 23.0.9 and 24.0.5 and Nextcloud Enterprise Server prior to versions 22.2.10.5, 23.0.9, and 24.0.5 an attacker reading `nextcloud.log` may gain… | ||
| CVE-2021-32695 | Low | 0.25 | 3.9 | 0.01 | Jun 17, 2021 | Nextcloud Android app is the Android client for Nextcloud. In versions prior to 3.16.1, a malicious app on the same device could have gotten access to the shared preferences of the Nextcloud Android application. This required user-interaction as a victim had to initiate the… | ||
| CVE-2021-32678 | Low | 0.24 | 3.7 | 0.01 | Jul 12, 2021 | Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. This affects any OCS API controller (`OCSController`) using the `@BruteForceProtection` annotation. Risk depends… | ||
| CVE-2025-66556 | Low | 0.23 | 3.5 | 0.00 | Dec 5, 2025 | Nextcloud talk is a video & audio conferencing app for Nextcloud. Prior to 20.1.8 and 21.1.2, a participant with chat permissions was able to delete poll drafts of other participants within the conversation based on their numeric ID. This vulnerability is fixed in 20.1.8 and… | ||
| CVE-2025-66554 | Low | 0.23 | 3.5 | 0.00 | Dec 5, 2025 | Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were… | ||
| CVE-2025-66545 | Low | 0.23 | 3.5 | 0.00 | Dec 5, 2025 | Nextcloud Groupfolders provides admin-configured folders shared by everyone in a group or team. Prior to 14.0.11, 15.3.12, 16.0.15, 17.0.14, 18.1.8, 19.1.8, and 20.1.2, a user with read-only permission can restore a file from the trash bin. This vulnerability is fixed in… | ||
| CVE-2025-66514 | Low | 0.23 | 3.5 | 0.00 | Dec 5, 2025 | Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app's message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content… | ||
| CVE-2023-39955 | Low | 0.23 | 3.5 | 0.01 | Aug 10, 2023 | Notes is a note-taking app for Nextcloud, an open-source cloud platform. Starting in version 4.4.0 and prior to version 4.8.0, when creating a note file with HTML, the content is rendered in the preview instead of the file being offered to download. Nextcloud Notes app version… | ||
| CVE-2023-30540 | Low | 0.23 | 3.5 | 0.01 | Apr 17, 2023 | Nextcloud Talk is a chat, video & audio call extension for Nextcloud. In affected versions a user that was added later to a conversation can use this information to get access to data that was deleted before they were added to the conversation. This issue has been patched in… | ||
| CVE-2023-28834 | Low | 0.23 | 3.5 | 0.01 | Apr 3, 2023 | Nextcloud Server is an open source personal cloud server. Nextcloud Server 24.0.0 until 24.0.6 and 25.0.0 until 25.0.4, as well as Nextcloud Enterprise Server 23.0.0 until 23.0.11, 24.0.0 until 24.0.6, and 25.0.0 until 25.0.4, have an information disclosure vulnerability. A user… | ||
| CVE-2023-28845 | Low | 0.23 | 3.5 | 0.00 | Mar 31, 2023 | Nextcloud talk is a video & audio conferencing app for Nextcloud. In affected versions the talk app does not properly filter access to a conversations member list. As a result an attacker could use this vulnerability to gain information about the members of a Talk conversation,… | ||
| CVE-2023-28835 | Low | 0.23 | 3.5 | 0.01 | Mar 30, 2023 | Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker… | ||
| CVE-2023-25817 | Low | 0.23 | 3.5 | 0.01 | Mar 27, 2023 | Nextcloud server is an open source, personal cloud implementation. In versions from 24.0.0 and before 24.0.9 a user could escalate their permissions to delete files they were not supposed to deletable but only viewed or downloaded. This issue has been addressed andit is… | ||
| CVE-2022-39338 | Low | 0.23 | 3.5 | 0.01 | Nov 25, 2022 | user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint.… |
- risk 0.28cvss 4.3epss 0.01
The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may…
- risk 0.28cvss 4.3epss 0.01
Nextcloud Richdocuments in an open source self hosted online office. Nextcloud uses the WOPI ("Web Application Open Platform Interface") protocol to communicate with the Collabora Editor, the communication between these two services was not protected by a credentials or IP…
- risk 0.28cvss 4.3epss 0.01
Nextcloud Mail is a mail app for Nextcloud. In versions prior to 1.9.6, the Nextcloud Mail application does not, by default, render images in emails to not leak the read state. The privacy filter failed to filter images with a `background-image` CSS attribute. Note that the…
- 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 0.27cvss 4.2epss 0.00
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform, and Nextcloud Enterprise Server is the enterprise version of the file server software. In Nextcloud Server versions 25.0.x prior to 25.0.5 and versions 24.0.x prior to 24.0.10 as…
- risk 0.27cvss 4.1epss 0.01
Nextcloud Android app is the Android client for Nextcloud. In versions prior to 3.15.1, a malicious application on the same device is possible to crash the Nextcloud Android Client due to an uncaught exception. The vulnerability is patched in version 3.15.1.
- risk 0.26cvss 4.0epss 0.01
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. In Nextcloud Server prior to versions 23.0.9 and 24.0.5 and Nextcloud Enterprise Server prior to versions 22.2.10.5, 23.0.9, and 24.0.5 an attacker reading `nextcloud.log` may gain…
- risk 0.25cvss 3.9epss 0.01
Nextcloud Android app is the Android client for Nextcloud. In versions prior to 3.16.1, a malicious app on the same device could have gotten access to the shared preferences of the Nextcloud Android application. This required user-interaction as a victim had to initiate the…
- risk 0.24cvss 3.7epss 0.01
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. This affects any OCS API controller (`OCSController`) using the `@BruteForceProtection` annotation. Risk depends…
- risk 0.23cvss 3.5epss 0.00
Nextcloud talk is a video & audio conferencing app for Nextcloud. Prior to 20.1.8 and 21.1.2, a participant with chat permissions was able to delete poll drafts of other participants within the conversation based on their numeric ID. This vulnerability is fixed in 20.1.8 and…
- risk 0.23cvss 3.5epss 0.00
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were…
- risk 0.23cvss 3.5epss 0.00
Nextcloud Groupfolders provides admin-configured folders shared by everyone in a group or team. Prior to 14.0.11, 15.3.12, 16.0.15, 17.0.14, 18.1.8, 19.1.8, and 20.1.2, a user with read-only permission can restore a file from the trash bin. This vulnerability is fixed in…
- risk 0.23cvss 3.5epss 0.00
Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app's message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content…
- risk 0.23cvss 3.5epss 0.01
Notes is a note-taking app for Nextcloud, an open-source cloud platform. Starting in version 4.4.0 and prior to version 4.8.0, when creating a note file with HTML, the content is rendered in the preview instead of the file being offered to download. Nextcloud Notes app version…
- risk 0.23cvss 3.5epss 0.01
Nextcloud Talk is a chat, video & audio call extension for Nextcloud. In affected versions a user that was added later to a conversation can use this information to get access to data that was deleted before they were added to the conversation. This issue has been patched in…
- risk 0.23cvss 3.5epss 0.01
Nextcloud Server is an open source personal cloud server. Nextcloud Server 24.0.0 until 24.0.6 and 25.0.0 until 25.0.4, as well as Nextcloud Enterprise Server 23.0.0 until 23.0.11, 24.0.0 until 24.0.6, and 25.0.0 until 25.0.4, have an information disclosure vulnerability. A user…
- risk 0.23cvss 3.5epss 0.00
Nextcloud talk is a video & audio conferencing app for Nextcloud. In affected versions the talk app does not properly filter access to a conversations member list. As a result an attacker could use this vulnerability to gain information about the members of a Talk conversation,…
- risk 0.23cvss 3.5epss 0.01
Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker…
- risk 0.23cvss 3.5epss 0.01
Nextcloud server is an open source, personal cloud implementation. In versions from 24.0.0 and before 24.0.9 a user could escalate their permissions to delete files they were not supposed to deletable but only viewed or downloaded. This issue has been addressed andit is…
- risk 0.23cvss 3.5epss 0.01
user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint.…
Page 5 of 12