What is CVE-2023-25579?

CVE-2023-25579 is a medium-severity vulnerability in Nextcloud Server, classified under Path Traversal. CVSS score: 6.0/10. Published 2023-02-22.

How severe is CVE-2023-25579?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Path Traversal in Nextcloud Server

CVE-2023-25579

Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to creation of paths outside of ones own space and overwriting data from other users with crafted paths. This issue has been addressed in versions 25.0.2, 24.0.8, and 23.0.12. Users are advised to upgrade. There are no known workarounds for this issue.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2023-02-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (40.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Nextcloud Server
Nextcloud Security-Advisories — versions < 23.0.12, >= 24.0.0, < 24.0.8, >= 25.0.0, < 25.0.2

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/nextcloud/security-advisories/security/advisories/GHSA-273v-9h7x-p68v (Vendor Advisory)
github.com/nextcloud/server/pull/35074 (Patch)

Frequently asked questions

What is CVE-2023-25579?: CVE-2023-25579 is a medium-severity vulnerability in Nextcloud Server, classified under Path Traversal. CVSS score: 6.0/10. Published 2023-02-22.
How severe is CVE-2023-25579?: Medium severity. CVSS v3 base score is 6.0 out of 10.