Multiple vulnerabilities in WordPress Backup by Supsystic plugin

Published: 2021-02-11

Risk	Medium
Patch available	NO
Number of vulnerabilities	2
CVE-ID	N/A
CWE-ID	CWE-98 CWE-22
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Backup by Supsystic Web applications / Modules and components for CMS
Vendor	supsystic.com

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) PHP file inclusion

EUVDB-ID: #VU50624

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 - Improper Control of Filename for Include/Require Statement in PHP Program

Exploit availability: Yes

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.

2) Path traversal

EUVDB-ID: #VU50625