Cross-site scripting in Font Organizer for WordPress

1) Cross-site scripting

EUVDB-ID: #VU18056

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-9908

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 passed via the "manage_font_id" to /wp-admin/options-general.php script. A remote attacker can trick the victim to follow a specially crafted link 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.

Example:

http://[host]/wp-admin/options-general.php?manage_font_id='"><img src=x onerror=alert(1)>&page=font-setting-admin

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Font Organizer: 2.1.1

External links

http://lists.openwall.net/full-disclosure/2019/02/05/8
http://security-consulting.icu/blog/2019/02/wordpress-font-organizer-xss/
http://wpvulndb.com/vulnerabilities/9239

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.