CSV Injection in Newsletter plugin for WordPress

1) CSV Injection

EUVDB-ID: #VU26163

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to inject arbitrary code into CSV files.

The vulnerability exists due to insufficient sanitization of user-supplied data when constructing CSV files in the subscription form. A remote authenticated attacker can inject malicious data into the contact form fields that is used later by the plugin to generate CSV files. Such files can be opened with Microsoft Excel built-in functions and utilize its functionality to execute malicious macros.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Newsletter: 1.0.9 - 6.5.3

External links

http://wpvulndb.com/vulnerabilities/10135/
http://fortiguard.com/zeroday/FG-VD-20-045

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.