Path Traversal in Nextcloud Server
CVE-2023-28833
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.008 (53.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Nextcloud Server
- Nextcloud Security-Advisories — versions < 24.0.10, >= 25.0.0, < 25.0.4
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-ch7f-px7m-hg25 (Vendor Advisory)
- github.com/nextcloud/server/pull/36095 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2023-28833?
- CVE-2023-28833 is a low-severity vulnerability in Nextcloud Server, classified under Path Traversal. CVSS score: 2.4/10. Published 2023-03-30.
- How severe is CVE-2023-28833?
- Low severity. CVSS v3 base score is 2.4 out of 10.