Vulnerability identifier: #VU50624

Vulnerability risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-98

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Backup by Supsystic
Web applications / Modules and components for CMS

Vendor: supsystic.com

Description

The vulnerability allows a remote user to include and execute arbitrary PHP files on the server.

The vulnerability exists due to incorrect input validation when processing directory traversal characters passed via the "download" HTTP GET parameter. A remote administrator can send a specially crafted HTTP request to the affected application, include and execute arbitrary PHP code on the system with privileges of the web server.

Note, the vulnerability can be exploited via CSRF attack vector.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Backup by Supsystic: 2.1.5 - 2.3.9

---

External links
http://packetstormsecurity.com/files/download/161329/wpsupsysticbackup239-lfi.txt

---

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.