diff --git a/wp-admin/includes/class-wp-plugins-list-table.php b/wp-admin/includes/class-wp-plugins-list-table.php
index 0162ee4cbe..6535833710 100644
--- a/wp-admin/includes/class-wp-plugins-list-table.php
+++ b/wp-admin/includes/class-wp-plugins-list-table.php
@@ -177,9 +177,11 @@ class WP_Plugins_List_Table extends WP_List_Table {
 		if ( is_null( $term ) )
 			$term = wp_unslash( $_REQUEST['s'] );
 
-		foreach ( $plugin as $value )
-			if ( stripos( $value, $term ) !== false )
+		foreach ( $plugin as $value ) {
+			if ( false !== stripos( strip_tags( $value ), $term ) ) {
 				return true;
+			}
+		}
 
 		return false;
 	}
diff --git a/wp-admin/includes/class-wp-themes-list-table.php b/wp-admin/includes/class-wp-themes-list-table.php
index 9aa182be6e..be75de02a6 100644
--- a/wp-admin/includes/class-wp-themes-list-table.php
+++ b/wp-admin/includes/class-wp-themes-list-table.php
@@ -222,8 +222,9 @@ class WP_Themes_List_Table extends WP_List_Table {
 
 			foreach ( array( 'Name', 'Description', 'Author', 'AuthorURI' ) as $header ) {
 				// Don't mark up; Do translate.
-				if ( false !== stripos( $theme->display( $header, false, true ), $word ) )
+				if ( false !== stripos( strip_tags( $theme->display( $header, false, true ) ), $word ) ) {
 					continue 2;
+				}
 			}
 
 			if ( false !== stripos( $theme->get_stylesheet(), $word ) )