CVE-2023-51721 Stored Cross Site Scripting Vulnerability in Skyworth Router

Medium 6.9 Published 17 Jan 2024 Updated 17 Jun 2025

A remote attacker can inject malicious scripts via the Time Server 2 parameter in the Skyworth Router web interface, enabling stored XSS attacks.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-51721?

CVE-2023-51721 is a medium-severity cross-site scripting vulnerability in Hathway Skyworth Router CM5100, published on 17 Jan 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

This vulnerability exist in Skyworth Router CM5100, version 4.1.1.24, due to insufficient validation of user supplied input for the Time Server 2 parameter at its web interface. A remote attacker could exploit this vulnerability by supplying specially crafted input to the parameter at the web interface of the vulnerable targeted system.

Successful exploitation of this vulnerability could allow the attacker to perform stored XSS attacks on the targeted system.

Weakness: CWE-79

Which versions are affected by CVE-2023-51721?

It affects 1 product.

Products include Skyworthdigital Cm5100 Firmware.

How do I fix CVE-2023-51721?

No fix has been published for CVE-2023-51721 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-51721 being exploited?

There is no known exploitation of CVE-2023-51721 in the wild and no public exploit code.

Sources

Also known as GHSA-96f9-wjw8-f7j4.