Stored cross-site scripting in Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress

1) Stored cross-site scripting

EUVDB-ID: #VU25384

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8594

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in "recaptcha_site_key", "recaptcha_secret_key", "recaptcha_lang" and "date_format" keys. A remote authenticated attacker can permanently inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Ninja Forms – The Easy and Powerful Forms Builder: 3.4.22

External links

http://spider-security.co.uk/blog-cve-cve-2020-8594
http://wordpress.org/plugins/ninja-forms/#developers
http://wpvulndb.com/vulnerabilities/10070

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.