JezK

Edit File: block-user-enumeration.php

<?php

if ( ! defined( 'WPINC' ) || ! defined( 'ABSPATH' ) ) {
	die;
}

require_once ABSPATH . 'wp-includes/pluggable.php';

class RBBlockUserEnumerationPlugin {
	private static $instance = null;

private function __construct() {
	}

public static function get_instance() {
		if ( self::$instance === null ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

/**
	 * Helper function
	 * Get the users display_name
	 */
	public function get_user_nicename( $nicename ) {
		global $wpdb;

if ( ! $user = $wpdb->get_row( $wpdb->prepare( "SELECT `ID` FROM $wpdb->users WHERE `user_nicename` = %s", $nicename ) ) ) {
			return false;
		}

return get_user_by( 'id', $user->ID );
	}

/**
	 * Helper function
	 * Get the current logged in user
	 */
	public function get_logged_in_user( $login ) {
		return get_user_by( 'login', $login );
	}

/**
	 * Helper function
	 * Create a string from an array_key if the value of the key matches the searched input
	 */
	public function string_from( $array, $key ) {
		if ( array_key_exists( $key, $array ) ) {
			$value = $array[ $key ];
			if ( is_string( $value ) ) {
				return $value;
			}
		}
		return '';
	}

/**
	 * Check if the user is an admin, and if so, hide it's user_login on posts and archives and comments
	 * (will be hooked in later in this class)
	 * and replace it with it's display_name (hopefully not the same as the users login).
	 * If it has no nickname, return an empty string.
	 */
	public function raidboxes_hide_admin_username( $display_name ) {
		$user = self::get_logged_in_user( $display_name );
		if ( user_can( $user, 'administrator' ) ) {
			if ( strcasecmp( $user->display_name, $display_name ) !== 0 ) {
				return $user->display_name;
			} else {
				return '';
			}
		} else {
			return $display_name;
		}
	}

/**
	 * Check if the user is an admin, and if so, hide it's user_url on posts and archives
	 * (will be hooked in later in this class).
	 */
	public function raidboxes_hide_admin_url( $link ) {
		$nicename = ltrim( strrchr( rtrim( $link, '/' ), '/' ), '/' );

$user = self::get_user_nicename( $nicename );
		if ( user_can( $user, 'administrator' ) ) {
			return '';
		} else {
			return $link;
		}
	}

/**
	 * Remove author IDs from classes in comments
	 * (will be hooked in later in this class).
	 */
	public function raidboxes_remove_comment_user_id_in_classes( $classes ) {
		$removed = false;
		reset( $classes );
		while ( ( $k = key( $classes ) ) !== null ) {
			if ( strpos( $classes[ $k ], 'comment-author-' ) === 0 ) {
				unset( $classes[ $k ] );
				$removed = true;
			}
			next( $classes );
		}
		if ( $removed ) {
			$classes = array_values( $classes );
		}
		return $classes;
	}

/**
	 * Remove the comment_reply_link indicator of admin comments
	 */
	public function raidboxes_remove_comment_reply_link( $link, $args, $comment, $post ) {
		$link = preg_replace( '/aria-label=\'.+\'/', 'aria-label=\'\'', $link );
		return $link;
	}

/**
	 * Hide the username and urls from WordPress posts, comments and archives
	 */
	public function from_posts() {
		add_filter( 'the_author', array( $this, 'raidboxes_hide_admin_username' ), 10, 1 );
		add_filter( 'get_comment_author', array( $this, 'raidboxes_hide_admin_username' ), 10, 1 );
		add_filter( 'author_link', array( $this, 'raidboxes_hide_admin_url' ), 10, 1 );
		add_filter( 'comment_class', array( $this, 'raidboxes_remove_comment_user_id_in_classes' ), 10, 1 );
		add_filter( 'comment_reply_link', array( $this, 'raidboxes_remove_comment_reply_link' ), 10, 4 );
	}

/**
	 * Discourage the WordPress-REST-API from displaying
	 * user names and give back a 403 header
	 */
	public function from_rest_api() {
		$header_error_403         = 'HTTP/1.1 403 Forbidden';
		$header_content_type_json = 'Content-Type: application/json; charset=UTF-8';

$regex_api = '@/wp/v2/users\b@';

$request_uri = $this->string_from( $_SERVER, 'REQUEST_URI' );
		$rest_route  = $this->string_from( $_REQUEST, 'rest_route' );

$call_rest_api = preg_match( $regex_api, $request_uri ) || preg_match( $regex_api, $rest_route );

if ( $call_rest_api ) {
			header( $header_error_403 );
			header( $header_content_type_json );
			die( '{"code":"rest_user_cannot_view","message":"Sorry, you are not allowed to list users.","data":{"status":403}}' );
		}
	}

public static function init() {
		$block_user_enumeration = self::get_instance();
		$block_user_enumeration->from_posts();
		$block_user_enumeration->from_rest_api();
	}
}

RBBlockUserEnumerationPlugin::init();

Developer	CodeRevolution
Version	WordPress 4.9.x – 6.9.x, Other
Compatibility	Aesop Story Engine, bbPress 2.5.x – 2.6.x, Beaver Builder, Block Editor, BuddyPress 9.x.x – 10.x.x, Easy Digital Downloads, Elementor, Elementor Pro, Exchange 1.10.x, Gravity Forms, iThemes Exchange, Layers WP, Visual Composer, WooCommerce 5.x.x – 6.x.x, WP EasyCart, WP e-Commerce, WPBakery Page Builder, WPML, Cornerstone, Bootstrap 4.x – 5.x, Foundation 5 – 6
License	GPL

JezK

Edit File: block-user-enumeration.php

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