#VU40264 Cross-site scripting in CMS Made Simple - CVE-2016-2784

Vulnerability identifier: #VU40264

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2016-2784

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
CMS Made Simple
Web applications / CMS

Vendor: cmsmadesimple.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

CMS Made Simple 2.x before 2.1.3 and 1.x before 1.12.2, when Smarty Cache is activated, allow remote attackers to conduct cache poisoning attacks, modify links, and conduct cross-site scripting (XSS) attacks via a crafted HTTP Host header in a request.

Mitigation
Install update from vendor's website.

Vulnerable software versions

CMS Made Simple: 1.0 - 2.1.2

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External links
https://packetstormsecurity.com/files/136897/CMS-Made-Simple-Cache-Poisoning.html
https://seclists.org/fulldisclosure/2016/May/15
https://www.cmsmadesimple.org/2016/03/Announcing-CMSMS-1-12-2-kolonia/
https://www.cmsmadesimple.org/2016/04/Announcing-CMSMS-2-1-3-Black-Point/
https://www.securityfocus.com/archive/1/538272/100/0/threaded
https://www.exploit-db.com/exploits/39760/

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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, proof of concept for this vulnerability is available.