Disable Feeds WP

Sanitization missing for register_setting().

The plugin slug includes a restricted term. Your plugin slug - "disable-feeds-wp" - contains the restricted term "wp" which can be used within the plugin slug, as long as you don't use the full name in the plugin name. For example: You can use WP but not WordPress.

Processing form data without nonce verification.

wp_redirect() found. Using wp_safe_redirect(), along with the "allowed_redirect_hosts" filter if needed, can help avoid any chances of malicious redirects within code. It is also important to remember to call exit() after a redirect so that no other unwanted code is executed.

Detected usage of a possibly undefined superglobal array index: $_SERVER['HTTP_HOST']. Use isset() or empty() to check the index exists before using it

$_SERVER['HTTP_HOST'] not unslashed before sanitization. Use wp_unslash() or similar

Detected usage of a non-sanitized input variable: $_SERVER['HTTP_HOST']

Detected usage of a possibly undefined superglobal array index: $_SERVER['REQUEST_URI']. Use isset() or empty() to check the index exists before using it

$_SERVER['REQUEST_URI'] not unslashed before sanitization. Use wp_unslash() or similar

Detected usage of a non-sanitized input variable: $_SERVER['REQUEST_URI']