CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2020-27386
High (8.8) in flexdotnetcms project flexdotnetcms. EPSS 72% chance of exploitation in the next 30 days.
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>.
Severity
- EPSS
- 72% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CWE
- CWE-434
- Published
- Modified
- Record from
- the NVD, synced
Affected
- flexdotnetcms_project:flexdotnetcms
References
- http://packetstormsecurity.com/files/160411/FlexDotnetCMS-1.5.8-Arbitrary-ASP-File-Upload.html
- https://blog.vonahi.io/whats-in-a-re-name/
- https://github.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.9
- https://github.com/rapid7/metasploit-framework/pull/14339
- http://packetstormsecurity.com/files/160411/FlexDotnetCMS-1.5.8-Arbitrary-ASP-File-Upload.html