CVE-2023-35139

Medium

Description

A cross-site scripting (XSS) vulnerability in the CGI program of the Zyxel ATP series firmware versions 5.10 through 5.37, USG FLEX series firmware versions 5.00 through 5.37, USG FLEX 50(W) series firmware versions 5.10 through 5.37, USG20(W)-VPN series firmware versions 5.10 through 5.37, and VPN series firmware versions 5.00 through 5.37, could allow an unauthenticated LAN-based attacker to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed to steal cookies when the user visits the specific CGI used for dumping ZTP logs.

SeverityMedium

CVSS5.2

Exploit probability—

Product

Zyxel Zld

PublishedNov 28, 2023

First seenNov 28, 2023

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Vendor advisories

zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps

Affected products

Product	Affected versions	Fixed in
zyxel zld	5.10 ≤ v ≤ 5.37, 5.00 ≤ v ≤ 5.37	—

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