Vulnerability identifier: #VU36357

Vulnerability risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-17256

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Umbraco CMS
Web applications / CMS

Vendor: Umbraco

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data. The vulnerability allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.

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

Umbraco CMS: 7.12.3

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External links
http://www.cspcert.ph/advisories/2018/CVE-2018-17256.html

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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