Riskcovery

CVE-2026-9549

Fix XSS in service discovery active check output

State
Published
Severity
4.8 Medium
Published
Jun 8, 2026
Updated
Jun 8, 2026
Reserved
May 26, 2026

Read the record on cve.org

Description

Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can configure active or custom checks to inject malicious HTML or JavaScript into check output that executes in the browser of an admin or a user with host read permissions when they run the check on the service discovery page.

Scores

CVSSScoreVectorSource
4.04.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:NCheckmk

Weaknesses

  • CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

ProductVersions
CheckmkCheckmk GmbH
  • 2.5.0 to before 2.5.0p5Affected
  • 2.4.0 to before 2.4.0p31Affected
  • 2.3.0 to before 2.3.0p48Affected
  • 2.2.0Affected

References

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