CVE-2023-28833

EUVD-2023-32465 · Published Mar 30, 2023

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.

Technologies

Nextcloud Nextcloud Server

Weaknesses

CWE-22CWE-434

CVSS scores

v3.18.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Initial Access Execution Stealth

T1190Exploit Public-Facing Application T1574.010Services File Permissions Weakness

References

Potentially impacted assets

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