Exploit for Popup box < 3.8.6 - Admin+ Stored XSS in Categories CVE-2023-5809

## https://sploitus.com/exploit?id=WPEX-ID:F1EB05E8-1B7C-45B1-912D-F668BD68E265
1. Go to "Popup Box > Categories"
2. Add a new category and in the description field add `<script>alert(1)</script>`
3. Save and see the XSS