CVSS: 7.7EPSS: 0%CPEs: 12EXPL: 0CVE-2023-39962 – Users can delete external storage mount points
https://notcve.org/view.php?id=CVE-2023-39962
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 19.0.0 and prior to versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a malicious user could delete any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. As a workaround, disable app files_external. This also makes the external storage inaccessible but retains the configurations until a patched version has been deployed. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xwxx-2752-w3xm https://github.com/nextcloud/server/pull/39323 https://hackerone.com/reports/2047168 • CWE-284: Improper Access Control •
CVSS: 5.8EPSS: 0%CPEs: 9EXPL: 0CVE-2023-39958 – Missing brute force protection on password reset token OAuth2 API controller
https://notcve.org/view.php?id=CVE-2023-39958
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, missing protection allows an attacker to brute force the client secrets of configured OAuth2 clients. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vv27-g2hq-v48h https://github.com/nextcloud/server/pull/38773 https://hackerone.com/reports/1258448 • CWE-307: Improper Restriction of Excessive Authentication Attempts •
CVSS: 6.5EPSS: 0%CPEs: 9EXPL: 0CVE-2023-39952 – Advanced permissions not respected when copying entire group folders
https://notcve.org/view.php?id=CVE-2023-39952
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1, a user can access files inside a subfolder of a groupfolder accessible to them, even if advanced permissions would block access to the subfolder. Nextcloud Server versions 25.0.8, 26.0.3, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1 contain a patch for this issue. No known workarounds are available. • https://github.com/nextcloud/groupfolders/issues/1906 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-cq8w-v4fh-4rjq https://github.com/nextcloud/server/pull/38890 https://hackerone.com/reports/1808079 • CWE-284: Improper Access Control •
CVSS: 8.8EPSS: 0%CPEs: 10EXPL: 0CVE-2023-35928 – Nextcloud user scoped external storage can be used to gather credentials of other users
https://notcve.org/view.php?id=CVE-2023-35928
Nextcloud Server is a space for data storage on Nextcloud, a self-hosted productivity playform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 19.0.0 until 19.0.13.9, 20.0.0 until 20.0.14.14, 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, a user could use this functionality to get access to the login credentials of another user and take over their account. This issue has been patched in Nextcloud Server versions 25.0.7 and 26.0.2 and NextCloud Enterprise Server versions 19.0.13.9, 20.0.14.14, 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2. Three workarounds are available. Disable app files_external. Change config setting "Allow users to mount external storage" to disabled in "Administration" > "External storage" settings `…/index.php/settings/admin/externalstorages`. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-637g-xp2c-qh5h https://github.com/nextcloud/server/pull/38265 https://hackerone.com/reports/1978882 • CWE-274: Improper Handling of Insufficient Privileges •
CVSS: 8.1EPSS: 0%CPEs: 10EXPL: 0CVE-2023-35927 – Nextcloud system addressbooks can be modified by malicious trusted server
https://notcve.org/view.php?id=CVE-2023-35927
NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, when two server are registered as trusted servers for each other and successfully exchanged the share secrets, the malicious server could modify or delete VCards in the system addressbook on the origin server. This would impact the available and shown information in certain places, such as the user search and avatar menu. If a manipulated user modifies their own data in the personal settings the entry is fixed again. Nextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. A workaround is available. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87 https://github.com/nextcloud/server/pull/38247 https://hackerone.com/reports/1976754 • CWE-284: Improper Access Control •