Bolt CMS <3.6.2 allows XSS via text input click preview button as demonstrated by the Title field of a Configured and New Entry.
https://www.raifberkaydincel.com/bolt-cms-xss-vulnerability.html
https://www.exploit-db.com/exploits/46014/
https://github.com/rdincel1/Bolt-CMS-3.6.2---Cross-Site-Scripting