Cross-site scripting in Custom Menu Plugin for WordPress



Published: 2021-09-22
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2021-38321
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Custom Menu Plugin
Web applications / Modules and components for CMS

Vendor Sean Sullivan

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU56823

Risk: Low

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

CVE-ID: CVE-2021-38321

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 the "selected_menu" parameter in the ~/custom-menus.php file. 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.

Mitigation

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

Vulnerable software versions

Custom Menu Plugin: 1.3.2, 1.3.3

CPE2.3 External links

http://www.wordfence.com/vulnerability-advisories/#CVE-2021-38321
http://plugins.trac.wordpress.org/browser/custom-sub-menus/trunk/custom-menus.php?rev=2205549#L136

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.



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