CVE-2026-9227 GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter

The GutenBee – Gutenberg Blocks plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.20.1 via the gutenbeefileandextjson function. This is due to a flawed strpos substring check that only verifies whether the filename contains the string '.json' rath...