The WordPress security keys are a set of random variables that improve encryption of information stored in the user's cookies. These security keys are configured in the WordPress configuration file wp-config.php.
There are a total of four security keys:
One of these WordPress security keys is using a weak/predictable value that the scanner found in a dictionary. It's recommended to change the value of this WordPress security key.
Visit the WordPress.org Salt Generator website to generate random values for WordPress Security Keys (https://api.wordpress.org/secret-key/1.1/salt/).