#VU55503 Stored cross-site scripting in LuCI and OpenWrt - CVE-2021-33425

Vulnerability identifier: #VU55503

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33425

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LuCI
Web applications / JS libraries
OpenWrt
Operating systems & Components / Operating system

Vendor: openwrt.org

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 Web Interface. A remote 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

LuCI: 0.8.0 - 0.11.1

OpenWrt: 19.07.0 - 19.07.7

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External links
http://openwrt.com

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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.