Arbitrary file upload in Forminator plugin for WordPress

1) Arbitrary file upload

EUVDB-ID: #VU80191

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-4596

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file extension when uploading files within the upload_post_image() function. A remote non-authenticated attacker can upload and execute arbitrary file on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Forminator Contact Form, Poll & Quiz Builder: 1.5.1 - 1.24.6

External links

http://www.exploit-db.com/exploits/51664
http://www.wordfence.com/threat-intel/vulnerabilities/id/9cd87da6-1f4c-4a15-8ebb-6e0f8ef72513?source=cve
http://plugins.trac.wordpress.org/changeset/2954409/forminator/trunk/library/fields/postdata.php
http://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/forminator/forminator-1246-unauthenticated-arbitrary-file-upload

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.