CSRF in Ninja Forms plugin for WordPress

1) Cross-site request forgery

EUVDB-ID: #VU47484

Risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website, such as install arbitrary plugins.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected website.

Exploitation example:

http://[host]/wp-admin/admin-ajax.php?action=nf_services_install&plugin=<PLUGIN_NAME>&install_path=<INSTALL_PATH>

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress: 3.4.0 - 3.4.27

External links

http://wpdeeply.com/ninja-forms-before-3-4-27-1-simple-csrf-to-rce/
http://wpvulndb.com/vulnerabilities/10424/

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.