Bludit 3.9.2 allows remote code execution via bl-kernel/ajax/upload-images.php because PHP code can be entered with a .jpg file name, and then this PHP code can write other PHP code to a ../ pathname.
https://github.com/bludit/bludit/issues/1081
http://packetstormsecurity.com/files/158569/Bludit-3.9.2-Directory-Traversal.html
http://packetstormsecurity.com/files/157988/Bludit-3.9.12-Directory-Traversal.html
http://packetstormsecurity.com/files/155295/Bludit-Directory-Traversal-Image-File-Upload.html