Vulnerability identifier: #VU41455

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-5108

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
concrete5
Web applications / CMS

Vendor: PortlandLabs

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in single_pagesdownload_file.php in concrete5 before 5.6.3 when processing HTTP Referer header to index.php/download_file. A remote 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

concrete5: 5.4.2 - 5.6.2.1

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External links
http://osvdb.org/show/osvdb/109273
http://packetstormsecurity.com/files/127493/Concrete-5.6.2.1-REFERER-Cross-Site-Scripting.html
http://www.securityfocus.com/bid/68685
http://www.concrete5.org/documentation/background/version_history/5-6-3-release-notes

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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.