Vulnerability identifier: #VU5581

Vulnerability risk: High

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2015-1494

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
FancyBox
Web applications / Modules and components for CMS

Vendor: FancyBox

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

The vulnerability exists due to insufficient sanitization of user-input. A remote attacker can send a specially crafted HTTP request to vulnerable website and permanently store arbitrary HTML and JavaScript code on it. The code will be executed in browser of every website visitor.

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.

Note: the vulnerability was being actively exploited.

Mitigation
Update to version 3.0.3.

Vulnerable software versions

FancyBox: 3.0.2 - 3.0.3

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External links
http://seclists.org/oss-sec/2015/q1/422

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.