CF7 Reply Manager <= 1.2.3 - Authenticated (Subscriber+) Arbitrary File Upload

Description

The CF7 Reply Manager plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in all versions up to, and including, 1.2.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.