CVE-2023-7323Network attack vector

Stored XSS via unescaped created username

Published Oct 30, 2025 · Updated Oct 30, 2025

Stored XSS in Nagios Log Server before 2024R1 allows remote authenticated users to execute script in an administrator browser. The Create User function stores a supplied username without sufficient validation or output escaping, then renders it as active browser content. The attacker must access the administrative Create User workflow, and a victim must view the created user; resulting script runs with the victim browser privileges.

CVSS severity5.1
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Nagios Log Server before 2024R1 allows remote authenticated users to execute script in an administrator browser. The Create User function stores a supplied username without sufficient validation or output escaping, then renders it as active browser content. The attacker must access the administrative Create User workflow, and a victim must view the created user; resulting script runs with the victim browser privileges.

The record

CVE
CVE-2023-7323
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
Nagios Enterprises, LLC
Product
Nagios Log Server
Classifications
CWE-79, CAPEC-63, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 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=0 <2024R1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nagios Enterprises, LLC · Nagios Log Serverversion=0 <2024R1

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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