diff --git a/.phpcs.ruleset.xml b/.phpcs.ruleset.xml
index 87a70d8..599af99 100644
--- a/.phpcs.ruleset.xml
+++ b/.phpcs.ruleset.xml
@@ -24,6 +24,12 @@
 			https://github.com/PHPCompatibility/PHPCompatibilityWP -->
 	<rule ref="PHPCompatibilityWP"/>
 
+	<!-- Use the VIP Go ruleset. -->
+	<rule ref="WordPress-VIP-Go" />
+
+	<!-- Use the WordPress.com VIP ruleset. -->
+	<rule ref="WordPressVIPMinimum" />
+
 	<!-- For help in understanding this testVersion:
 		https://github.com/PHPCompatibility/PHPCompatibility#sniffing-your-code-for-compatibility-with-specific-php-versions -->
 	<config name="testVersion" value="5.3-"/>
diff --git a/composer.json b/composer.json
index cddfb26..cdaf16f 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,8 @@
     "php-coveralls/php-coveralls": "^2.1",
     "slowprog/composer-copy-file": "0.2.1",
     "wp-coding-standards/wpcs": "*",
-    "xwp/wp-dev-lib": "^1.1.1"
+    "xwp/wp-dev-lib": "^1.1.1",
+    "automattic/vipwpcs": "^2.0"
   },
   "scripts": {
     "phpcs": [
diff --git a/wp-includes/rest-api/auth/class-wp-rest-key-pair.php b/wp-includes/rest-api/auth/class-wp-rest-key-pair.php
index df47258..6f55faa 100644
--- a/wp-includes/rest-api/auth/class-wp-rest-key-pair.php
+++ b/wp-includes/rest-api/auth/class-wp-rest-key-pair.php
@@ -356,11 +356,14 @@ public function authenticate( $user, WP_REST_Request $request ) {
 
 		$found    = false;
 		$keypairs = $this->get_user_key_pairs( $get_user->ID );
+
+		// Update the "Last IP" which accessed the keypair. This may not work
+		// in some environments due to caching.
 		foreach ( $keypairs as $_key => $item ) {
 			if ( isset( $item['api_key'] ) && $item['api_key'] === $key ) {
 				$keypairs[ $_key ]['last_used'] = time();
 
-				$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? filter_var( wp_unslash( $_SERVER['REMOTE_ADDR'] ), FILTER_VALIDATE_IP ) : null;
+				$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? filter_var( wp_unslash( $_SERVER['REMOTE_ADDR'] ), FILTER_VALIDATE_IP ) : null; // phpcs:ignore WordPressVIPMinimum.Variables.ServerVariables.UserControlledHeaders, WordPressVIPMinimum.Variables.RestrictedVariables.cache_constraints___SERVER__REMOTE_ADDR__
 				if ( $ip ) {
 					$keypairs[ $_key ]['last_ip'] = $ip;
 				}
@@ -705,6 +708,7 @@ public function template_new_key_pair() {
 	 * @since 0.1
 	 */
 	public function template_new_token_key_pair() {
+		// phpcs:disable WordPressVIPMinimum.Security.Mustache.OutputNotation
 		?>
 		<script type="text/html" id="tmpl-new-token-key-pair">
 			<div class="new-key-pair notification-dialog-wrap" data-api_key="{{ data.api_key }}"  data-name="{{ data.name }}">
@@ -761,6 +765,7 @@ public function template_new_token_key_pair() {
 			</div>
 		</script>
 		<?php
+		// phpcs:enable WordPressVIPMinimum.Security.Mustache.OutputNotation
 	}
 
 	/**
diff --git a/wp-includes/rest-api/auth/class-wp-rest-token.php b/wp-includes/rest-api/auth/class-wp-rest-token.php
index b51ecb6..b308f0b 100644
--- a/wp-includes/rest-api/auth/class-wp-rest-token.php
+++ b/wp-includes/rest-api/auth/class-wp-rest-token.php
@@ -344,7 +344,7 @@ public function authenticate_refresh_token( $user, WP_REST_Request $request ) {
 			if ( isset( $item['api_key'] ) && $item['api_key'] === $token->data->user->api_key ) {
 				$keypairs[ $_key ]['last_used'] = time();
 
-				$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? filter_var( wp_unslash( $_SERVER['REMOTE_ADDR'] ), FILTER_VALIDATE_IP ) : null;
+				$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? filter_var( wp_unslash( $_SERVER['REMOTE_ADDR'] ), FILTER_VALIDATE_IP ) : null; // phpcs:ignore WordPressVIPMinimum.Variables.ServerVariables.UserControlledHeaders, WordPressVIPMinimum.Variables.RestrictedVariables.cache_constraints___SERVER__REMOTE_ADDR__
 				if ( $ip ) {
 					$keypairs[ $_key ]['last_ip'] = $ip;
 				}
@@ -380,8 +380,8 @@ public function authenticate_refresh_token( $user, WP_REST_Request $request ) {
 	 */
 	public function require_token() {
 		$require_token  = true;
-		$request_uri    = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( $_SERVER['REQUEST_URI'] ) : false;
-		$request_method = isset( $_SERVER['REQUEST_METHOD'] ) ? sanitize_text_field( $_SERVER['REQUEST_METHOD'] ) : false;
+		$request_uri    = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : false;
+		$request_method = isset( $_SERVER['REQUEST_METHOD'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ) : false;
 
 		// User is already authenticated.
 		$user = wp_get_current_user();
@@ -775,11 +775,11 @@ public function validate_token() {
 	public function get_auth_header() {
 
 		// Get HTTP Authorization Header.
-		$header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? sanitize_text_field( $_SERVER['HTTP_AUTHORIZATION'] ) : false;
+		$header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_AUTHORIZATION'] ) ) : false;
 
 		// Check for alternative header.
 		if ( ! $header && isset( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) ) {
-			$header = sanitize_text_field( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] );
+			$header = sanitize_text_field( wp_unslash( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) );
 		}
 
 		// The HTTP Authorization Header is missing, return an error.