phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.
Improper Control of Interaction Frequency The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.