The Ocean Extra WordPress plugin before 2.0.5 unserialises the content of an imported file, which could lead to PHP object injections issues when a high privilege user import (intentionally or not) a malicious Customizer Styling file and a suitable gadget chain is present on the blog.
https://wpscan.com/vulnerability/22fd3f28-9036-4bd5-ad98-ff78bd1b51bc