A Server Side Request Forgery (SSRF) vulnerability in elFinder before 2.1.46 could allow a malicious user to access the content of internal network resources. This occurs in get_remote_contents() in php/elFinder.class.php.
https://github.com/Studio-42/elFinder/commit/2f522db8f037a66ce9040ee0b216aa4a0359286c
https://github.com/Studio-42/elFinder/blob/68ec63c0aeca3963101aca8f842dc9f2e4c4c6d3/Changelog