Joomla! Easydiscuss component versions prior to 4.0.21 suffer from a cross site scripting vulnerability.
a5ecebe3d594d56be239429ba067ef39# Exploit Title: Joomla Plugin Easydiscuss <4.0.21 Persistent XSS in Edit Message
# Date: 06-01-2018
# Software Link: https://stackideas.com/easydiscuss
# Exploit Author: Mattia Furlani
# CVE: CVE-2018-5263
# Category: webapps
1. Description
Whenever a user edits a message with <\textarea> inside the body, everything after the <\textarea> will be executed in the useras browser. Works with every version up to 4.0.20
2. Proof of Concept
Login with permissions to post a message, insert <\textarea> in the body and add any html code after that, whenever a user tries to edit that message the code writed after you closed the textarea will be executed
3. Solution:
Update to version 4.0.21
https://stackideas.com/blog/easydiscuss4021-update