CVE-2023-22921 Cross-site scripting in NBG-418N v2 firmware
An authenticated administrator can inject malicious scripts via the web interface, causing denial-of-service conditions on the Zyxel router.
- 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-2023-22921?
CVE-2023-22921 is a high-severity cross-site scripting vulnerability in Zyxel NBG-418N v2 firmware, published on 1 May 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
A cross-site scripting (XSS) vulnerability in the Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.14)C0 could allow a remote authenticated attacker with administrator privileges to store malicious scripts using a web management interface parameter, resulting in denial-of-service (DoS) conditions on an affected device.
Weakness: CWE-79
Which versions are affected by CVE-2023-22921?
It affects 1 product.
Products include Zyxel Nbg-418n Firmware.
How do I fix CVE-2023-22921?
No fix has been published for CVE-2023-22921 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-2023-22921 being exploited?
There is no known exploitation of CVE-2023-22921 in the wild and no public exploit code.
Other vulnerabilities in Zyxel NBG-418N v2 firmware
Sources
Also known as GHSA-8rhh-pq82-8f6m.