Concrete5 up to and including 8.5.2 allows Unrestricted Upload of File with Dangerous Type such as a .php file via File Manager. It is possible to modify site configuration to upload the PHP file and execute arbitrary commands.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24986
Reference (s):
- https://hackerone.com/reports/768322