#VU18864 Cross-site scripting in Support Board - Chat And Help Desk 

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Main Vulnerability Database Vulnerabilities #VU18864

#VU18864 Cross-site scripting in Support Board - Chat And Help Desk

Published: June 21, 2019 / Updated: June 24, 2019


Vulnerability identifier: #VU18864
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Support Board - Chat And Help Desk
Software vendor:
Schiocco

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to weak security measures like bad textarea data filtering. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

PoC: 

Example #1: <img src=x onerror=alert(document.cookie)>
Example #2: <img src=x onerror=alert('m0ze');window.open('//m0ze.ru/')>
Example #3: <img src=x onerror=alert('m0ze');window.location='//m0ze.ru/'>


Remediation

Install updates from vendor's website.

External links