CVE-2023-35928
HIGHDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 60% of all known CVEs.
References
Related Vulnerabilities
Other CWE-274 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-35534 | High | 7.2 | 1.7% | - | - |
| CVE-2025-20156 | Critical | 9.9 | 1.2% | - | Fix |
| CVE-2022-45101 | High | 7.3 | 0.8% | - | Fix |
| CVE-2021-32006 | Medium | 5.0 | 0.6% | - | - |
| CVE-2022-0668 | Medium | 5.3 | 0.6% | - | Fix |
| CVE-2023-39375 | High | 7.5 | 0.6% | - | Fix |
Common questions
How do I fix CVE-2023-35928?
Upgrade nextcloud server to 26.0.2 or later.
Is CVE-2023-35928 being actively exploited?
Not that we know of. CVE-2023-35928 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.98% is the estimated probability that it will be exploited in the next 30 days. That is higher than 60% of all scored CVEs.
How severe is CVE-2023-35928?
CVE-2023-35928 has a CVSS v3 base score of 8.4, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2023-35928 affect?
Published advisories record a fix for nextcloud server (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2023-35928
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.