CVE-2020-27385 Information

Description

Incorrect Access Control in the FileEditor (/Admin/Views/FileEditor/) in FlexDotnetCMS before v1.5.11 allows an authenticated remote attacker to read and write to existing files outside the web root. The files can be accessed via directory traversal i.e. by entering a .. (dot dot) path such as ..\..\..\..\..\file in the input field of the FileEditor. In FlexDotnetCMS before v1.5.8 it is also possible to access files by specifying the full path (e.g. C:\file). The files can then be edited via the FileEditor.

Reference

https://blog.vonahi.io/whats-in-a-re-name/ https://github.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.11