An "Unrestricted Upload of File with Dangerous Type" issue with directory traversal in navigate_upload.php in Naviwebs Navigate CMS 2.8 allows authenticated attackers to achieve remote code execution via a POST request with engine=picnik and id=../../../navigate_info.php.
https://www.exploit-db.com/exploits/45561/
https://github.com/rapid7/metasploit-framework/pull/10704
https://github.com/NavigateCMS/Navigate-CMS/commit/2bdcb8b3c5bb23851a2115db96585f1ac8cb2d1e