Ticket #57149: 57149.diff

src/wp-includes/class-wpdb.php

@@ -3531 +3531 @@
                  * which drop-ins can use for routing these SQL statements.
                  */
                 if ( preg_match( '/^\s*SHOW\s+(?:TABLE\s+STATUS|(?:FULL\s+)?TABLES)\s+(?:WHERE\s+Name\s+)?LIKE\s*("|\')((?:[\\\\0-9a-zA-Z$_.-]|[\xC2-\xDF][\x80-\xBF])+)%?\\1/is', $query, $maybe ) ) {
-                        return str_replace( '\\_', '_', $maybe[2] );
+                        return str_replace( ['\\\\_', '\\_'], '_', $maybe[2] );
                 }
 
                 // Big pattern for the rest of the table-related queries.