Wordpress Infusionsoft Gravity Forms Add-on Arbitrary File Upload Vulnerability

Summary
This host is installed with Wordpress Infusionsoft Gravity Forms Add-on and is prone to remote file upload vulnerability.
Impact
Successful exploitation will allow an unauthenticated remote attacker to upload files in an affected site. Impact Level: Application
Solution
Upgrade to version 1.5.11 or later, For updates refer to https://wordpress.org/plugins/infusionsoft
Insight
Flaw is due to the plugin failed to restrict access to certain files.
Affected
WordPress Infusionsoft Gravity Forms Add-on version 1.5.3 to 1.5.10
Detection
Send a crafted data via HTTP GET request and check whether it is is able to upload file or not.
References