CVE-2020-27386

Public Exploit

Description

An unrestricted file upload issue in FlexDotnetCMS before v1.5.9 allows an authenticated remote attacker to upload and execute arbitrary files by using the FileManager to upload malicious code (e.g., ASP code) in the form of a safe file type (e.g., a TXT file), and then using the FileEditor (in v1.5.8 and prior) or the FileManager's rename function (in v1.5.7 and prior) to rename the file to an executable extension (e.g., ASP), and finally executing the file via an HTTP GET request to /<path_to_file>.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 84.67% Top 5%
Third-Party Advisory packetstormsecurity.com Third-Party Advisory vonahi.io Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.9 third party advisory release notes
https://blog.vonahi.io/whats-in-a-re-name/ third party advisory exploit
https://github.com/rapid7/metasploit-framework/pull/14339 exploit third party advisory patch
http://packetstormsecurity.com/files/160411/FlexDotnetCMS-1.5.8-Arbitrary-ASP-File-Upload.html vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-27386?
CVE-2020-27386 has been scored as a high severity vulnerability.
How to fix CVE-2020-27386?
To fix CVE-2020-27386, 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-2020-27386 being actively exploited in the wild?
It is possible that CVE-2020-27386 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~85% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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