CVE-2021-23427

Public Exploit
Arbitrary File Write via Archive Extraction (Zip Slip)

Description

This affects all versions of package elFinder.NetCore. The ExtractAsync function within the FileSystem is vulnerable to arbitrary extraction due to insufficient validation.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.63%
Third-Party Advisory snyk.io
Affected: n/a elFinder.NetCore
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-DOTNET-ELFINDERNETCORE-1567778 third party advisory exploit
https://github.com/gordon-matt/elFinder.NetCore/blob/633da9a4d7d5c9baefd1730ee51bf7af54889600/elFinder.NetCore/Drivers/FileSystem/FileSystemDriver.cs%23L226 broken link

Frequently Asked Questions

What is the severity of CVE-2021-23427?
CVE-2021-23427 has been scored as a high severity vulnerability.
How to fix CVE-2021-23427?
To fix CVE-2021-23427, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23427 being actively exploited in the wild?
It is possible that CVE-2021-23427 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23427?
CVE-2021-23427 affects n/a elFinder.NetCore.
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