Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can change global settings to store malicious HTML or JavaScript in changelog messages that executes in other users' browsers when they view the Activate Changes page or Audit log.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Checkmk GmbH Checkmk unaffected
Version Status Constraints
2.5.0 affected < 2.5.0p5
2.4.0 affected < 2.4.0p31
2.3.0 affected < 2.3.0p48
2.2.0 affected —

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Checkmk Subscribe
Checkmk Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://checkmk.com/werk/17992 cve-icon cve-icon
History

Mon, 08 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 08 Jun 2026 13:00:00 +0000

Type Values Removed Values Added
Description Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can change global settings to store malicious HTML or JavaScript in changelog messages that executes in other users' browsers when they view the Activate Changes page or Audit log.
Title Fix stored XSS in global settings change log
First Time appeared Checkmk
Checkmk checkmk
Weaknesses CWE-79
CPEs cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*
Vendors & Products Checkmk
Checkmk checkmk
References
Metrics cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Checkmk

Published:

Updated: 2026-06-08T13:03:18.164Z

Reserved: 2026-05-07T11:16:47.854Z

Link: CVE-2026-8078

cve-icon Vulnrichment

Updated: 2026-06-08T13:03:15.299Z

cve-icon NVD

Status : Received

Published: 2026-06-08T13:16:33.760

Modified: 2026-06-08T13:16:33.760

Link: CVE-2026-8078

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses