WordPress WP Sitemap Page 1.6.4 Cross Site Scripting

WordPress WP Sitemap Page plugin version 1.6.4 suffers from a persistent cross site scripting vulnerability.

MD5 | 1e674ac8d9367b4656c8d1abf7e800ba

# Exploit Title: WordPress Plugin WP Sitemap Page 1.6.4 - Stored Cross-Site Scripting (XSS)
# Date: 07/09/2021
# Exploit Author: Nikhil Kapoor
# Software Link: https://wordpress.org/plugins/wp-sitemap-page/
# Version: 1.6.4
# Category: Web Application
# Tested on Windows

How to Reproduce this Vulnerability:

1. Install WordPress 5.8.0
2. Install and activate WP Sitemap Page
3. Navigate to Settings >> WP Sitemap Page >> Settings and enter the XSS payload into the "How to display the posts" Input field.
4. Click Save Changes.
5. You will observe that the payload successfully got stored into the database and when you are triggering the same functionality at that time JavaScript payload is executing successfully and we are getting a pop-up.
6. Payload Used: </textarea><svg/onload=confirm('XSS')>

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