What is CVE-2023-22921?

CVE-2023-22921 is a high-severity vulnerability in Zyxel Nbg-418n, classified under Cross-site Scripting. CVSS score: 7.5/10. Published 2023-05-01.

How severe is CVE-2023-22921?

High severity. CVSS v3 base score is 7.5 out of 10.

XSS in Zyxel Nbg-418n

CVE-2023-22921

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (40.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:H.

Affected products

Zyxel Nbg-418n — versions v2
Zyxel Nbg-418n_firmware
Zyxel Nbg-418n V2 Firmware — versions < V1.00(AARP.14)C0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@zyxel.com.tw (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-22921?: CVE-2023-22921 is a high-severity vulnerability in Zyxel Nbg-418n, classified under Cross-site Scripting. CVSS score: 7.5/10. Published 2023-05-01.
How severe is CVE-2023-22921?: High severity. CVSS v3 base score is 7.5 out of 10.