CVE-2021-23428
CRITICALCVSS 9.8/10EPSS 1.67%
Last modified
CVE-2021-23428 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. This affects all versions of package elFinder.NetCore. The Path.Combine(...) method is used to create an absolute file path. EPSS estimates a 1.67% chance of exploitation in the next 30 days.
Description
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
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Elfinder.Netcore Project | Elfinder.Netcore | All versions |
References
- https://github.com/gordon-matt/elFinder.NetCoreProduct, Third Party Advisory
- https://snyk.io/vuln/SNYK-DOTNET-ELFINDERNETCORE-1313838Third Party Advisory
- https://github.com/gordon-matt/elFinder.NetCoreProduct, Third Party Advisory
- https://snyk.io/vuln/SNYK-DOTNET-ELFINDERNETCORE-1313838Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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
How severe is CVE-2021-23428?
CVE-2021-23428 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.67% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23428?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-23428?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST