CVEvulnerability

CVE-2023-28833

8.8 HIGH Published 2023-03-30 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-03-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
2.4 LOW — CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-22, CWE-434

Description

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.

Affected configurations

• nextcloud nextcloud server (>= 23.0.0 < 23.0.14) • nextcloud nextcloud server (>= 24.0.0 < 24.0.10) • nextcloud nextcloud server (>= 25.0.0 < 25.0.4)

Related

Weakness · CWE (2)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type weakness

References