diff --git a/wp-activate.php b/wp-activate.php
index 3258c07d32..65a07d00b9 100644
--- a/wp-activate.php
+++ b/wp-activate.php
@@ -117,6 +117,8 @@ add_action( 'wp_head', 'wpmu_activate_stylesheet' );
 add_action( 'wp_head', 'wp_sensitive_page_meta' );
 
 get_header( 'wp-activate' );
+
+$blog_details = get_blog_details();
 ?>
 
 <div id="signup-content" class="widecolumn">
@@ -124,7 +126,7 @@ get_header( 'wp-activate' );
 	<?php if ( ! $key ) { ?>
 
 		<h2><?php _e( 'Activation Key Required' ); ?></h2>
-		<form name="activateform" id="activateform" method="post" action="<?php echo network_site_url( 'wp-activate.php' ); ?>">
+		<form name="activateform" id="activateform" method="post" action="<?php echo network_site_url( $blog_details->path . 'wp-activate.php' ); ?>">
 			<p>
 				<label for="key"><?php _e( 'Activation Key:' ); ?></label>
 				<br /><input type="text" name="key" id="key" value="" size="50" />
@@ -146,7 +148,7 @@ get_header( 'wp-activate' );
 				printf(
 					/* translators: 1: Login URL, 2: Username, 3: User email address, 4: Lost password URL. */
 					__( 'Your account has been activated. You may now <a href="%1$s">log in</a> to the site using your chosen username of &#8220;%2$s&#8221;. Please check your email inbox at %3$s for your password and login instructions. If you do not receive an email, please check your junk or spam folder. If you still do not receive an email within an hour, you can <a href="%4$s">reset your password</a>.' ),
-					network_site_url( 'wp-login.php', 'login' ),
+					network_site_url( $blog_details->path . 'wp-login.php', 'login' ),
 					$signup->user_login,
 					$signup->user_email,
 					wp_lostpassword_url()
@@ -155,7 +157,7 @@ get_header( 'wp-activate' );
 				printf(
 					/* translators: 1: Site URL, 2: Username, 3: User email address, 4: Lost password URL. */
 					__( 'Your site at %1$s is active. You may now log in to your site using your chosen username of &#8220;%2$s&#8221;. Please check your email inbox at %3$s for your password and login instructions. If you do not receive an email, please check your junk or spam folder. If you still do not receive an email within an hour, you can <a href="%4$s">reset your password</a>.' ),
-					sprintf( '<a href="http://%1$s">%1$s</a>', $signup->domain ),
+					sprintf( '<a href="http://%1$s%2$s">%1$s%2$s</a>', $signup->domain, $blog_details->path ),
 					$signup->user_login,
 					$signup->user_email,
 					wp_lostpassword_url()
@@ -195,8 +197,12 @@ get_header( 'wp-activate' );
 			<?php else : ?>
 				<p class="view">
 				<?php
-					/* translators: 1: Login URL, 2: Network home URL. */
-					printf( __( 'Your account is now activated. <a href="%1$s">Log in</a> or go back to the <a href="%2$s">homepage</a>.' ), network_site_url( 'wp-login.php', 'login' ), network_home_url() );
+					printf(
+						/* translators: 1: Login URL, 2: Network home URL. */
+						__( 'Your account is now activated. <a href="%1$s">Log in</a> or go back to the <a href="%2$s">homepage</a>.' ),
+						network_site_url( $blog_details->path . 'wp-login.php', 'login' ),
+						network_home_url( $blog_details->path )
+					);
 				?>
 				</p>
 				<?php
diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 839b103509..8ccb47c875 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -605,12 +605,17 @@ function wp_login_form( $args = array() ) {
  * @return string Lost password URL.
  */
 function wp_lostpassword_url( $redirect = '' ) {
-	$args = array();
+	$args = array(
+		'action' => 'lostpassword',
+	);
+
 	if ( ! empty( $redirect ) ) {
 		$args['redirect_to'] = urlencode( $redirect );
 	}
 
-	$lostpassword_url = add_query_arg( $args, network_site_url( 'wp-login.php?action=lostpassword', 'login' ) );
+	$blog_details = get_blog_details();
+
+	$lostpassword_url = add_query_arg( $args, network_site_url( $blog_details->path . 'wp-login.php', 'login' ) );
 
 	/**
 	 * Filters the Lost Password URL.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e5001012b9..5294490b4a 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta4-48671';
+$wp_version = '5.5-beta4-48672';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.