Vulnerability identifier: #VU50625

Vulnerability risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-22

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 delete arbitrary files on the server.

The vulnerability exists due to input validation error when processing directory traversal sequences passed via the "filename" parameter. A remote user can send a specially crafted HTTP request and delete arbitrary files on the system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Backup by Supsystic: 2.1.5 - 2.3.9

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

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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.