CVE-2024-2380Network attack vector

Stored XSS via unencoded service names

Published Apr 5, 2024 · Updated Aug 1, 2024

Stored XSS in Checkmk 2.3.0 before 2.3.0b4 allows remote authenticated users to execute script via crafted service names. Graph rendering serializes stored service names containing HTML tags without the customized JSON encoding needed to keep the tags from becoming executable markup. A low-privileged account must create the service name, and a user must view its graph; the script then runs with that user's browser privileges.

CVSS severity4.6
Medium
EPSS probability0.34%
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 Checkmk 2.3.0 before 2.3.0b4 allows remote authenticated users to execute script via crafted service names. Graph rendering serializes stored service names containing HTML tags without the customized JSON encoding needed to keep the tags from becoming executable markup. A low-privileged account must create the service name, and a user must view its graph; the script then runs with that user's browser privileges.

The record

CVE
CVE-2024-2380
Published
Apr 5, 2024
Updated
Aug 1, 2024
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-80, CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=2.3.0 <2.3.0b4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.3.0 <2.3.0b4

Published CVSS scores

4.6Checkmk GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007Command and Scripting Interpreter JavaScript

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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