The ShopLentor WordPress plugin before 2.5.4 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
https://wpscan.com/vulnerability/533c19d5-219c-4389-a8bf-8b3a35b33b20