Deactivate and delete. This plugin has been closed as of March 28, 2022 and is not available for download. This closure is temporary, pending a full review.
Roel van Beurden discovered and reported this Arbitrary File Upload vulnerability in WordPress Advanced Uploader Plugin. This could allow a malicious actor to upload any type of file to your website. This can include backdoors which are then executed to gain further access to your website. This vulnerability has not been known to be fixed yet.