Vulnerability identifier: #VU22204

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-2019-16982

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 an unsanitized "id" variable to app\access_controls\access_control_nodes.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 update from vendor's repository.

Vulnerable software versions

FusionPBX: Master

---

External links
http://github.com/fusionpbx/fusionpbx/commit/c9f87dc16def2135930ebbfd667651cc3f6de2ff
http://resp3ctblog.wordpress.com/2019/10/19/fusionpbx-xss-14/
http://www.fusionpbx.com/app/tickets/ticket_edit.php?id=af41abf3-8f92-41b6-973a-89ef8cd14be5

---

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.