A FortiGate WAF bypass payload for XSS vulnerability was shared by @xss0r. The payload is '<details open ontoggle="(()=>alert`ibrahimxss`)()"></details>'. This payload can execute the JavaScript alert 'ibrahimxss' when triggered. For more technical details, refer to the tweet by @xss0r.
For more insights, check out the original tweet here: https://twitter.com/XssPayloads/status/1840223957171290200