Vulnerability identifier: #VU57621

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-39344

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
KJM Admin Notices
Web applications / Modules and components for CMS

Vendor: Marc-Antoine Minville

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 within several parameters in the ~/admin/class-kjm-admin-notices-admin.php file. A remote authenticated attacker can 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
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

KJM Admin Notices: 1.0.4 - 2.0.1

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External links
http://github.com/BigTiger2020/word-press/blob/main/KJM%20Admin%20Notices.md
http://plugins.trac.wordpress.org/browser/kjm-admin-notices/trunk/admin/class-kjm-admin-notices-admin.php
http://www.wordfence.com/vulnerability-advisories/#CVE-2021-39344

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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.