What is CVE-2021-23428?

CVE-2021-23428 is a high-severity vulnerability in Elfinder.netcore Project, classified under Path Traversal. CVSS score: 8.6/10. Published 2021-09-01.

How severe is CVE-2021-23428?

High severity. CVSS v3 base score is 8.6 out of 10.

Path Traversal in Elfinder.netcore Project

CVE-2021-23428

This affects all versions of package elFinder.NetCore. The Path.Combine(...) method is used to create an absolute file path. Due to missing sanitation of the user input and a missing check of the generated path its possible to escape the Files directory via path traversal

Vulnerability class: Path Traversal (Directory Traversal)

Published 2021-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.

EPSS exploit prediction

EPSS: 0.017 (76.1th percentile), scored 2026-10-09.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Elfinder.netcore Project
Elfinder.netcore — versions 0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

snyk.io/vuln/SNYK-DOTNET-ELFINDERNETCORE-1313838 (Third Party Advisory)
github.com/gordon-matt/elFinder.NetCore (Product, Third Party Advisory)
github.com/gordon-matt/elFinder.NetCore/blob/633da9a4d7d5c9baefd1730ee51bf7af54… (Broken Link)

Frequently asked questions

What is CVE-2021-23428?: CVE-2021-23428 is a high-severity vulnerability in Elfinder.netcore Project, classified under Path Traversal. CVSS score: 8.6/10. Published 2021-09-01.
How severe is CVE-2021-23428?: High severity. CVSS v3 base score is 8.6 out of 10.