Description
WordPress Plugin Crelly Slider 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 Crelly Slider version 1.3.4 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.3.5 or latest
References
https://blog.nintechnet.com/arbitrary-file-upload-vulnerability-in-wordpress-crelly-slider-plugin/
https://plugins.svn.wordpress.org/crelly-slider/trunk/readme.txt