Vulnerability identifier: #VU39752

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-1566

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Guacamole
Server applications / Remote management servers, RDP, SSH

Vendor: Apache Foundation

Description

Vulnerability allows a remote attacker to perform Cross-site scripting attacks.

An input validation error exists in the file browser in Guacamole 0.9.8 and 0.9.9, when file transfer is enabled to a location shared by multiple users,. A remote authenticated attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Guacamole: 0.9.8 - 0.9.9

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External links
http://sourceforge.net/p/guacamole/news/2016/02/security-advisory---stored-xss-cve-2016-1566--guac-1465/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.