From 3b7e4338572bf9833afc3e1c824dd4d812094b41 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Fri, 3 May 2024 14:30:56 +0000
Subject: [PATCH] Login and Registration: Check that `post_password` is a
 string in `wp-login.php`.

This prevents a fatal error if an array is passed instead.

Follow-up to [19925], [34909], [58023].

Props dd32, swissspidy.
Fixes #61136.

git-svn-id: https://develop.svn.wordpress.org/trunk@58093 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-login.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wp-login.php b/src/wp-login.php
index bd4568a4690b5..18811aae57b74 100644
--- a/src/wp-login.php
+++ b/src/wp-login.php
@@ -753,7 +753,7 @@ function wp_login_viewport_meta() {
 		break;
 
 	case 'postpass':
-		if ( ! array_key_exists( 'post_password', $_POST ) ) {
+		if ( ! isset( $_POST['post_password'] ) || ! is_string( $_POST['post_password'] ) ) {
 			wp_safe_redirect( wp_get_referer() );
 			exit;
 		}