Jump to content
  • Entries

    16114
  • Comments

    7952
  • Views

    86391992

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

# Exploit Title: MyBB Threads to Link Plugin v1.3 - Persistent XSS
# Date: 3/15/2018
# Author: 0xB9
# Contact: luxorforums.com/User-0xB9 or 0xB9[at]protonmail.com
# Software Link: https://community.mybb.com/mods.php?action=view&pid=1065
# Version: v1.3
# Tested on: Ubuntu 17.10
CVE: CVE-2018-10365


1. Description:
When editing a thread the user is given to the option to convert the thread to a link.


2. Proof of Concept:

Persistent XSS
- Edit a thread or post you've made
- At the bottom of the edit page in the Thread Link box input the following <a """><SCRIPT>alert("XSS")</SCRIPT>">
- Now visit the forum your thread/post exists in to see the alert.


3. Solution:
The plugin has since been removed after notifying the author.

Patch in line 83:
$thread['tlink'] = ($thread['tlink']);

to

$thread['tlink'] = htmlspecialchars_uni($thread['tlink']);