Description
WordPress Plugin Quiz and Survey Master (QSM)-Easy Quiz and Survey Maker is prone to multiple vulnerabilities, including arbitrary file deletion and arbitrary file upload vulnerabilities. An attacker may leverage these issues to delete arbitrary files or to upload arbitrary code and run it in the context of the webserver process, which may facilitate unauthorized access or privilege escalation. WordPress Plugin Quiz and Survey Master (QSM)-Easy Quiz and Survey Maker version 7.0.0 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 7.0.1 or latest
References
https://www.youtube.com/watch?v=sC4U-oNW34c
https://plugins.svn.wordpress.org/quiz-master-next/trunk/readme.txt