CVE-2023-35928
HighCVSS 8.4Exploitation Probability (EPSS)
Elevated risk51th percentile - higher than 51% of all known CVEs
Summary
In Nextcloud Server versions 25.0.0 to 25.0.7 and 26.0.0 to 26.0.2, as well as in Nextcloud Enterprise Server versions 19.0.0 to 19.0.13.9, there was a vulnerability that allowed users to access another user's login credentials and take over their account. This issue has been patched in newer versions of the software.
Risk Assessment
This vulnerability poses a serious risk to the organization's security, allowing unauthorized access to user accounts, which can lead to data loss and privacy breaches.
Recommendation
It is recommended to upgrade to the latest versions of Nextcloud Server and Nextcloud Enterprise Server. Alternatively, available workarounds can be applied, such as disabling the files_external app and changing configuration settings regarding external storage.
Other vulnerabilities in Nextcloud Server, Nextcloud Enterprise Server
See all- CVE-2023-35927High
NextCloud Server and NextCloud Enterprise Server have a vulnerability that allows a malicious server to modify or delete VCards in the system address book when two servers are registered as trusted and exchange share secrets. This affects versions from 25.0.0 to 25.0.7 and from 26.0.0 to 26.0.2, as well as various versions of Nextcloud Enterprise Server.
- CVE-2023-35172High
NextCloud Server and NextCloud Enterprise Server have a vulnerability that allows an attacker to bruteforce password reset links in specific versions of the software. This affects versions 25.0.0 to 25.0.7 and 26.0.0 to 26.0.2 for NextCloud Server and various versions of NextCloud Enterprise Server.
- CVE-2023-35171Medium
NextCloud Server and NextCloud Enterprise Server provide file storage for a productivity platform. In versions 26.0.0 to 26.0.2, an attacker could supply a URL that redirects an unsuspecting user from a legitimate domain to an attacker's site.
Original NVD description (English source)
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`. Change config setting to disallow users to create external storages in "Administration" > "External storage" settings `…/index.php/settings/admin/externalstorages` with the types FTP, Nextcloud, SFTP, and/or WebDAV.