Gravity Forms <= 2.10.4 - Unauthenticated Arbitrary File Read via 'gform_uploaded_files' Parameter

The Gravity Forms plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.10.4 via the 'gform_uploaded_files' parameter parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. Exploitation requires the targeted form to not enforce login (so publicly accessible), which allows the unauthenticated attacker to reach the process_send_resume_link endpoint and supply an arbitrary recipient email address to receive the traversal-retrieved file as a notification attachment.