Description
WordPress Plugin External Media is prone to a vulnerability that lets attackers upload arbitrary files because the application fails to properly verify user-supplied input. An attacker can exploit this vulnerability to upload arbitrary code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation; other attacks are also possible. WordPress Plugin External Media version 1.0.33 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.0.34 or latest
References
https://www.wordfence.com/blog/2021/05/critical-vulnerability-patched-in-external-media-plugin/
https://plugins.svn.wordpress.org/external-media/trunk/readme.txt