After login to portal create a new post and type the following text with XSS payload
Login to portal.
create a post with xss paylaod
save it
POC: https://drive.google.com/file/d/1WkQpGyQGKBS-9To5mlud_qkkL7VOp9Au/view?usp=share_link
/*/**<input type="text" value=`` <div/onmouseover='alert(1)'>X</div>**/*/*