Joomla! Easydiscuss Cross Site Scripting

2018.01.11

Credit: Mattia Furlani

Risk: Low

Local: Yes

Remote: No

CVE: CVE-2018-5263

CWE: CWE-79

CVSS Base Score: 3.5/10

Impact Subscore: 2.9/10

Exploitability Subscore: 6.8/10

Exploit range: Remote

Attack complexity: Medium

Authentication: Single time

Confidentiality impact: None

Integrity impact: Partial

Availability impact: None

# 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

References:

https://stackideas.com/blog/easydiscuss4021-update

See this note in RAW Version

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Joomla! Easydiscuss Cross Site Scripting

References:

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