CVE-2023-28645

Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments

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 Nextcloud Office app (richdocuments) is upgraded to 8.0.0-beta.1, 7.0.2 or 6.3.2. Users unable to upgrade may mitigate the issue by taking steps to restrict the ability to download documents. This includes ensuring that the `WOPI configuration` is configured to only serve documents between Nextcloud and Collabora. It is highly recommended to define the list of Collabora server IPs as the allow list within the Office admin settings of Nextcloud.

CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Richdocuments

CVE-2023-28844

User without download rights can download older version of that file in nextcloud server

Nextcloud server is an open source home cloud implementation. In affected versions users that should not be able to download a file can still download an older version and use that for uncontrolled distribution. This issue has been addressed in versions 24.0.10 and 25.0.4. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2023-28845

Chat room membership disclosed via autocompletion in Nextcloud talk

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, even if they themselves are not members. It is recommended that the Nextcloud Talk is upgraded to 14.0.9 or 15.0.4. There are no known workarounds for this vulnerability.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Talk

CVE-2023-28999

Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access to E2EE folders

Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files.​ This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.

CVSS 3.1 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Desktop Nextcloud

CVE-2023-29000

Nextcloud Desktop client does not verify received singed certificate in end-to-end encryption

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.7.0, by trusting that the server will return a certificate that belongs to the keypair of the user, a malicious server could get the desktop client to encrypt files with a key known to the attacker. This issue is fixed in Nextcloud Desktop 3.7.0. No known workarounds are available.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Desktop

CVE-2023-28848

CSRF protection on user_oidc login returned the expected token in case of an error

user_oidc is the OIDC connect user backend for Nextcloud, an open source collaboration platform. A vulnerability in versions 1.0.0 until 1.3.0 effectively allowed an attacker to bypass the state protection as they could just copy the expected state token from the first request to their second request. Users should upgrade user_oidc to 1.3.0 to receive a patch for the issue. No known workarounds are available.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

User Oidc

CVE-2023-28998

Nextcloud Desktop client misbehaves with E2EE when the server returns empty list of metadata keys

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Desktop

CVE-2023-28834

Full path of data directory exposed to Nextcloud server users

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 was able to get the full data directory path of the Nextcloud server from an API endpoint. By itself this information is not problematic as it can also be guessed for most common setups, but it could speed up other unknown attacks in the future if the information is known. Nextcloud Server 24.0.6 and 25.0.4 and Nextcloud Enterprise Server 23.0.11, 24.0.6, and 25.0.4 contain patches for this issue. There are no known workarounds.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2023-30539

Users can set up workflows using restricted and invisible system tags in Nextcloud

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 the Nextcloud Server is upgraded to 24.0.11 or 25.0.5, the Nextcloud Enterprise Server to 21.0.9.11, 22.2.10.11, 23.0.12.6, 24.0.11 or 25.0.5, and the Nextcloud Files automated tagging app to 1.11.1, 1.12.1, 1.13.1, 1.14.2, 1.15.3 or 1.16.1. Users unable to upgrade should disable all workflow related apps. Users are advised to upgrade.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Files Automated Tagging Nextcloud Server

CVE-2023-28847

Nextcloud Server missing brute force protection for passwords of password protected share links

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. In Nextcloud Server 24.0.0 prior to 24.0.11 and 25.0.0 prior to 25.0.5; as well as Nextcloud Server Enterprise 23.0.0 prior to 23.0.12.6, 24.0.0 prior to 24.0.11, and 25.0.0 prior to 25.0.5; an attacker is not restricted in verifying passwords of share links so they can just start brute forcing the password. Nextcloud Server 24.0.11 and 25.0.5 and Nextcloud Enterprise Server 23.0.12.6, 24.0.11, and 25.0.5 contain a fix for this issue. No known workarounds are available.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2024-52518

Nextcloud Server is missing password confirmation when changing external storage options

Nextcloud Server is a self hosted personal cloud system. After an attacker got access to the session of a user or administrator, the attacker would be able to create, change or delete external storages without having to confirm the password. It is recommended that the Nextcloud Server is upgraded to 28.0.12, 29.0.9 or 30.0.2.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2024-52519

Nextcloud Server's OAuth2 client secrets were stored in a recoverable way

Nextcloud Server is a self hosted personal cloud system. The OAuth2 client secrets were stored in a recoverable way, so that an attacker that got access to a backup of the database and the Nextcloud config file, would be able to decrypt them. 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.

CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2024-52521

Nextcloud Server has a potential hash collision for background jobs could skip queuing them

Nextcloud Server is a self hosted personal cloud system. MD5 hashes were used to check background jobs for their uniqueness. This increased the chances of a background job with arguments falsely being identified as already existing and not be queued for execution. By changing the Hash to SHA256 the probability was heavily decreased. It is recommended that the Nextcloud Server is upgraded to 28.0.10, 29.0.7 or 30.0.0.

CVSS 3.1 · 2.6 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2023-32074

Nextcloud user_oidc app is missing brute force protection

user_oidc app is an OpenID Connect user backend for Nextcloud. Authentication can be broken/bypassed in user_oidc app. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.2

CVSS 3.1 · 8 High EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

User Oidc

CVE-2023-31128

NextCloud Cookbook's pull-checks.yml workflow is vulnerable to OS Command Injection

NextCloud Cookbook is a recipe library app. Prior to commit a46d9855 on the `master` branch and commit 489bb744 on the `main-0.9.x` branch, the `pull-checks.yml` workflow is vulnerable to command injection attacks because of using an untrusted `github.head_ref` field. The `github.head_ref` value is an attacker-controlled value. Assigning the value to `zzz";echo${IFS}"hello";#` can lead to command injection. Since the permission is not restricted, the attacker has a write-access to the repository. This issue is fixed in commit a46d9855 on the `master` branch and commit 489bb744 on the `main-0.9.x` branch. There is no risk for the user of the app within the NextCloud server. This only affects the main repository and possible forks of it. Those who have forked the NextCloud Cookbook repository should make sure their forks are on the latest version to prevent code injection attacks and similar.

CVSS 3.1 · 8.1 High EPSS 3.3% KEV · Not listed

Vendors

Nextcloud

Products

Cookbook

CVE-2023-32318

User session not correctly destroyed on logout

Nextcloud server provides a home for data. A regression in the session handling between Nextcloud Server and the Nextcloud Text app prevented a correct destruction of the session on logout if cookies were not cleared manually. After successfully authenticating with any other account the previous session would be continued and the attacker would be authenticated as the previously logged in user. It is recommended that the Nextcloud Server is upgraded to 25.0.6 or 26.0.1.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2023-32319

Basic auth header on WebDAV requests is not brute-force protected in Nextcloud

Nextcloud server is an open source personal cloud implementation. Missing brute-force protection on the WebDAV endpoints via the basic auth header allowed to brute-force user credentials when the provided user name was not an email address. Users from version 24.0.0 onward are affected. This issue has been addressed in releases 24.0.11, 25.0.5 and 26.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Nextcloud Server

CVE-2023-33184

Blind SSRF in the Nextcloud Mail app on avatar endpoint

Nextcloud Mail is a mail app in Nextcloud. A blind SSRF attack allowed to send GET requests to services running in the same web server. It is recommended that the Mail app is update to version 3.02, 2.2.5 or 1.15.3.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Mail

CVE-2023-33182

Nextcloud Contacts photos only sanitized if mime type is all lower case

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. The unsanitized SVG is converted to a JavaScript blob (in memory data) that the Avatar can't render. Due to this constellation the missing sanitization does not seem to be exploitable. It is recommended that the Contacts app is upgraded to 5.0.3 or 4.2.4

CVSS 3.1 · 0 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Contacts

CVE-2023-33183

Error in calendar when booking an appointment reveals the full path of the website

Calendar app for Nextcloud easily sync events from various devices with your Nextcloud. Some internal paths of the website are disclosed when the SMTP server is unavailable. It is recommended that the Calendar app is updated to 3.5.5 or 4.2.3

CVSS 3.1 · 2.6 Low EPSS < 1% KEV · Not listed

Vendors

Nextcloud

Products

Calendar