CVE-2023-2390Network attack vector

Reflected XSS via unescaped NTP server input

Published Apr 28, 2023 · Updated Jan 30, 2025

Reflected XSS in the NETGEAR SRX5308 Web Management Interface 4.3.5-3 allows remote authenticated users to run script in an administrator's browser. The time-zone handler at scgi-bin/platform.cgi?page=time_zone.htm returns the ntp.server1 value in generated HTML without neutralizing script content. Administrative access is required to submit the setting, and a user must render the crafted response; successful exploitation alters content in that browser context.

CVSS severity4.8
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the NETGEAR SRX5308 Web Management Interface 4.3.5-3 allows remote authenticated users to run script in an administrator's browser. The time-zone handler at scgi-bin/platform.cgi?page=time_zone.htm returns the ntp.server1 value in generated HTML without neutralizing script content. Administrative access is required to submit the setting, and a user must render the crafted response; successful exploitation alters content in that browser context.

The record

CVE
CVE-2023-2390
Published
Apr 28, 2023
Updated
Jan 30, 2025
Vendor
NETGEAR
Product
ProSAFE Gigabit Quad WAN SSL VPN Firewall SRX5308
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3.5-3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

NETGEAR · ProSAFE Gigabit Quad WAN SSL VPN Firewall SRX5308version=4.3.5-3

Published CVSS scores

3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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