Ticket #31183: 31183.3.diff

src/wp-admin/plugin-install.php

@@ -15 +15 @@
  */
 require_once( dirname( __FILE__ ) . '/admin.php' );
 
-if ( ! current_user_can( 'install_plugins' ) ) {
+if ( ! current_user_can( 'install_plugins' ) && ! ( isset( $_GET['tab'] ) && ( 'plugin-information' == $_GET['tab'] ) ) ) {
         wp_die( __( 'Sorry, you are not allowed to install plugins on this site.' ) );
 }