8.8

CVE-2023-28833

Unrestricted filenames for logo or favicon as admin in the theming settings in nextcloud server

Ability to control the filename when uploading a logo or favicon as admin in the theming settings

Nextcloud server is an open source home cloud implementation. In affected versions admins of a server were able to upload a logo or a favicon and to provided a file name which was not restricted and could overwrite files in the appdata directory. Administrators may have access to overwrite these files by other means but this method could be exploited by tricking an admin into uploading a maliciously named file. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should avoid ingesting logo files from untrusted sources.
Mögliche Gegenmaßnahme
Server: * No workaround available
Enterprise Server: * No workaround available
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Nextcloud ≫ Nextcloud Server SwEditionenterprise Version >= 23.0.0 < 23.0.14
Nextcloud ≫ Nextcloud Server SwEdition- Version >= 24.0.0 < 24.0.10
Nextcloud ≫ Nextcloud Server SwEditionenterprise Version >= 24.0.0 < 24.0.10
Nextcloud ≫ Nextcloud Server SwEdition- Version >= 25.0.0 < 25.0.4
Nextcloud ≫ Nextcloud Server SwEditionenterprise Version >= 25.0.0 < 25.0.4
VulnDex Vulnerability Enrichment
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Weitere Schwachstelleninformationen
SystemNextcloud
≫
Produkt Server
Version >= 24.0.0, < 24.0.10
Version >= 25.0.0, < 25.0.4
SystemNextcloud
≫
Produkt Enterprise Server
Version >= 23.0.0, < 23.0.14
Version >= 24.0.0, < 24.0.10
Version >= 25.0.0, < 25.0.4
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.63% 0.702
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
security-advisories@github.com 2.4 0.9 1.4
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CWE-434 Unrestricted Upload of File with Dangerous Type

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.