Vulnerability identifier: #VU35018

Vulnerability risk: Low

CVSSv3.1: 5.6 [AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-19384

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FusionPBX
Server applications / SCADA systems

Vendor: FusionPBX

Description

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

An input validation error exists in app/fax/fax_log_view.php in FusionPBX 4.4.1 when processing fax_uuid parameter. A remote attacker can trick the victim to follow a 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
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

FusionPBX: 4.4.1

---

External links
http://gist.github.com/xax007/28e7326acfae677be0b351216888e522
http://github.com/fusionpbx/fusionpbx/commit/aea1abaeb12f69dc22967395c528fb2434e316c1

---

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.