Vulnerability-Lookup

GHSA-6WCG-PXR7-8826

Vulnerability from github – Published: 2026-04-07 15:30 – Updated: 2026-04-22 15:31

Details

Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.

Severity ?

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

8.5 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-3466"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-07T13:16:47Z",
    "severity": "HIGH"
  },
  "details": "Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.",
  "id": "GHSA-6wcg-pxr7-8826",
  "modified": "2026-04-22T15:31:32Z",
  "published": "2026-04-07T15:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3466"
    },
    {
      "type": "WEB",
      "url": "https://checkmk.com/werk/19033"
    },
    {
      "type": "WEB",
      "url": "https://checkmk.com/werk/19583"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashlet-title"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-3466 (GCVE-0-2026-3466)

Vulnerability from cvelistv5 – Published: 2026-04-07 12:08 – Updated: 2026-04-22 12:26

Title

Cross-site scripting in dashlet title

Summary

Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.

Severity ?

8.5 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N

CWE

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

Assigner

Checkmk

References

URL

Tags

	https://checkmk.com/werk/19033	vendor-advisory
	https://checkmk.com/werk/19583	vendor-advisory
	https://www.vulncheck.com/advisories/checkmk-stor…	third-party-advisory

Impacted products

	Vendor	Product	Version
	Checkmk GmbH	Checkmk	Affected: 2.2.0 (semver) Affected: 2.3.0 , < 2.3.0p46 (semver) Affected: 2.4.0 , < 2.4.0p25 (semver) Affected: 2.5.0b1 , < 2.5.0 (semver)

Credits

Alex Williams (Pellera Technologies)

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
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            "other": {
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                "id": "CVE-2026-3466",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-07T13:18:39.707466Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-07T13:18:48.034Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "product": "Checkmk",
          "vendor": "Checkmk GmbH",
          "versions": [
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            },
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              "status": "affected",
              "version": "2.3.0",
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            },
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              "lessThan": "2.4.0p25",
              "status": "affected",
              "version": "2.4.0",
              "versionType": "semver"
            },
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              "lessThan": "2.5.0",
              "status": "affected",
              "version": "2.5.0b1",
              "versionType": "semver"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "criteria": "cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*",
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          "value": "Alex Williams (Pellera Technologies)"
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      "descriptions": [
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          "lang": "en",
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      "impacts": [
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          "descriptions": [
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N",
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      "references": [
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          "url": "https://checkmk.com/werk/19583"
        },
        {
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    "datePublished": "2026-04-07T12:08:50.132Z",
    "dateReserved": "2026-03-03T09:09:01.487Z",
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}

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.

Action not permitted

GHSA-6WCG-PXR7-8826

CVE-2026-3466 (GCVE-0-2026-3466)

Tags

Sightings

Nomenclature