Missing theme/plugin editor

Theme or plugin editor are posing a risk to security, at least according to people a lot smarter than me!
Many auto-installers, hostings, security plugins are amending wp-config file by adding a couple of constants.

If you cannot see theme/plugin editor, check your wp-config.php file for the following lines:

define( 'DISALLOW_FILE_EDIT', true );
define( 'DISALLOW_FILE_MODS', true );

One or the other (or both together) may be blocking you from seeing those editors in the dashboard.

If any of these is present in your wp-config file, you may want to comment them out like this:

// define( 'DISALLOW_FILE_EDIT', true ); 
// define( 'DISALLOW_FILE_MODS', true );