Go to homepageCyberStrike

Menu

Star on GitHub · 3.3k
Sign inDownload

CVE-2020-27386

8.8 · HIGH

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…

Published Nov 12, 2020CWE-434EPSS 72.87%

Overview

CVE-2020-27386 is a high-severity vulnerability. It was published on November 12, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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>.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/160411/FlexDotnetCMS-1.5.8-Arbitrary-ASP-File-Upload.htmlRefblog.vonahi.io/whats-in-a-re-name/GitHubgithub.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.9GitHubgithub.com/rapid7/metasploit-framework/pull/14339Refpacketstormsecurity.com/files/160411/FlexDotnetCMS-1.5.8-Arbitrary-ASP-File-Upload.htmlRefblog.vonahi.io/whats-in-a-re-name/GitHubgithub.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.9GitHubgithub.com/rapid7/metasploit-framework/pull/14339

How CyberStrike helps

Frequently asked questions

What is CVE-2020-27386?

CVE-2020-27386 is a high-severity vulnerability. It was published on November 12, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2020-27386?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-27386?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-27386?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-27386 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2020

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
LiveWatch live →