A security flaw has been discovered in CouchCMS up to 2.4. Affected is an unknown function of the file couch/config.example.php of the component reCAPTCHA Handler. The manipulation of the argument K_RECAPTCHA_SITE_KEY/K_RECAPTCHA_SECRET_KEY results in use of hard-coded cryptographic key . It is possible to launch the attack remotely. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been released to the public and may be used for attacks.