The GOautodial API prior to commit 3c3a979 made on October 13th, 2021 exposes an API router that accepts a username, password, and action that routes to other PHP files that implement the various API functions. Vulnerable versions of GOautodial validate the username and password incorrectly, allowing the caller to specify any values for these parameters and successfully authenticate. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C