Cross-site scripting in GetSimple CMS

1) Cross-site scripting

EUVDB-ID: #VU14714

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-9173

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

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

An input validation error exists in admin/template/js/uploadify/uploadify.swf in GetSimple CMS 3.3.13. A remote non-authenticated attacker can trick the victim to follow a specially 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

GetSimple CMS: 3.3.13

External links

http://github.com/GetSimpleCMS/GetSimpleCMS/issues/1266
http://www.exploit-db.com/exploits/44408/

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.