Vulnerability · Published Mar 30, 2023 · Assigned by GitHub_M
CVE-2023-28833Unrestricted filenames for logo or favicon as admin in the theming settings in nextcloud server
Low 2.4
In plain English
A low-severity path traversal in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | < 24.0.10>= 25.0.0, < 25.0.4 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ch7f-px7m-hg25 x_refsource_CONFIRM
- https://github.com/nextcloud/server/pull/36095 x_refsource_MISC