Description
The cross-site scripting (XSS) vulnerability in Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker with administrator privileges to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed when the user visits the Logs page of the GUI on the device.
Published: 2023-04-24
Score: 4.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2023-31715 The cross-site scripting (XSS) vulnerability in Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker with administrator privileges to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed when the user visits the Logs page of the GUI on the device.
History

Wed, 25 Feb 2026 16:45:00 +0000

Type Values Removed Values Added
Description The cross-site scripting (XSS) vulnerability in Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker with administrator privileges to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed when the user visits the Logs page of the GUI on the device. The cross-site scripting (XSS) vulnerability in Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker with administrator privileges to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed when the user visits the Logs page of the GUI on the device.

Subscriptions

Zyxel Atp100 Atp100 Firmware Atp100w Atp100w Firmware Atp200 Atp200 Firmware Atp500 Atp500 Firmware Atp700 Atp700 Firmware Atp800 Atp800 Firmware Usg20-vpn Usg20-vpn Firmware Usg 20w-vpn Usg 20w-vpn Firmware Usg Flex 100 Usg Flex 100 Firmware Usg Flex 100w Usg Flex 100w Firmware Usg Flex 200 Usg Flex 200 Firmware Usg Flex 50 Usg Flex 500 Usg Flex 500 Firmware Usg Flex 50 Firmware Usg Flex 50w Usg Flex 50w Firmware Usg Flex 700 Usg Flex 700 Firmware Vpn100 Vpn1000 Vpn1000 Firmware Vpn100 Firmware Vpn300 Vpn300 Firmware Vpn50 Vpn50 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: Zyxel

Published:

Updated: 2024-08-02T12:23:30.803Z

Reserved: 2023-03-09T00:00:00.000Z

Link: CVE-2023-27990

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-04-24T18:15:09.440

Modified: 2026-02-25T17:19:32.820

Link: CVE-2023-27990

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses