Vulnerability identifier: #VU18516

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-12426

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WP Live Chat Support
Web applications / Modules and components for CMS

Vendor: WP-LiveChat

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to absent validation of file extension when uploading files via v1/remote_upload request. A remote attacker can upload and execute arbitrary .php file on the server and execute it.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WP Live Chat Support: 1.0 - 8.0.06

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External links
http://github.com/CodeCabin/wp-live-chat-support/blob/master/readme.txt
http://github.com/RiieCco/write-ups/tree/master/CVE-2018-12426

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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.