CVE-2025-39663 (GCVE-0-2025-39663)

Vulnerability from cvelistv5 – Published: 2025-10-30 10:43 – Updated: 2025-11-07 16:04
VLAI?
Summary
Cross-Site Scripting (XSS) vulnerability in Checkmk's distributed monitoring allows a compromised remote site to inject malicious HTML code into service outputs in the central site. Affecting Checkmk before 2.4.0p14, 2.3.0p39, 2.2.0 and 2.1.0 (eol).
Severity ?
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
Impacted products
Vendor Product Version
Checkmk GmbH Checkmk Affected: 2.4.0 , < 2.4.0p14 (semver)
Affected: 2.3.0 , < 2.3.0p39 (semver)
Affected: 2.2.0 (semver)
Affected: 2.1.0 (semver)
Create a notification for this product.
Credits
Lisa Gnedt (SBA Research)
Show details on NVD website
To clipboard 

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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://seclists.org/fulldisclosure/2025/Nov/0\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-07T16:04:27.994Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-39663\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-30T13:25:54.862081Z\"}}}], \"references\": [{\"url\": \"https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9a850f4e/2025/SBA-ADV-20250729-01_Checkmk_Cross_Site_Scripting\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-30T13:25:45.664Z\"}}], \"cna\": {\"title\": \"Cross Site Scripting through compromised remote site\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Lisa Gnedt (SBA Research)\"}], \"impacts\": [{\"capecId\": \"CAPEC-592\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-592: Stored XSS\"}]}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N\"}}], \"affected\": [{\"vendor\": \"Checkmk GmbH\", \"product\": \"Checkmk\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.4.0\", \"lessThan\": \"2.4.0p14\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.3.0\", \"lessThan\": \"2.3.0p39\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.2.0\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.1.0\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://checkmk.com/werk/17998\"}, {\"url\": \"https://github.com/sbaresearch/advisories/tree/82fd27e4570433464c30b35150b197db9a850f4e/2025/SBA-ADV-20250729-01_Checkmk_Cross_Site_Scripting\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Cross-Site Scripting (XSS) vulnerability in Checkmk\u0027s distributed monitoring allows a compromised remote site to inject malicious HTML code into service outputs in the central site. Affecting Checkmk before 2.4.0p14, 2.3.0p39, 2.2.0 and 2.1.0 (eol).\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-80\", \"description\": \"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)\"}]}], \"providerMetadata\": {\"orgId\": \"f7d6281c-4801-44ce-ace2-493291dedb0f\", \"shortName\": \"Checkmk\", \"dateUpdated\": \"2025-10-30T10:44:22.121Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-39663\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-07T16:04:27.994Z\", \"dateReserved\": \"2025-04-16T07:07:38.256Z\", \"assignerOrgId\": \"f7d6281c-4801-44ce-ace2-493291dedb0f\", \"datePublished\": \"2025-10-30T10:43:08.500Z\", \"assignerShortName\": \"Checkmk\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.