Vulnerability identifier: #VU22205

Vulnerability risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16983

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FusionPBX
Server applications / SCADA systems

Vendor: FusionPBX

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 passed via the "param"  HTTP parameter to resources\paging.php script. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in 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 updates from vendor's repository.

Vulnerable software versions

FusionPBX: Master

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External links
http://github.com/fusionpbx/fusionpbx/commit/23581e56e9a4d1685ddf1c7d67137417d654e134
http://resp3ctblog.wordpress.com/2019/10/19/fusionpbx-xss-15/
http://www.fusionpbx.com/app/tickets/ticket_edit.php?id=2a1baae1-b906-4577-a10b-b1734f9fe4b2

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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.