FKIE_CVE-2026-7765

Vulnerability from fkie_nvd - Published: 2026-06-08 13:16 - Updated: 2026-06-17 11:02
Severity
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.
References
security@checkmk.comhttps://checkmk.com/werk/19815Vendor Advisory
Impacted products
Vendor Product Version
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
checkmk checkmk 2.5.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Checkmk",
          "vendor": "Checkmk GmbH",
          "versions": [
            {
              "lessThan": "2.5.0p5",
              "status": "affected",
              "version": "2.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@checkmk.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "7797AFCE-3FF9-497C-AEA9-D6CF170F056D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:b1:*:*:*:*:*:*",
              "matchCriteriaId": "F8943BB3-1487-494C-B4EB-89EB0B18B6A2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:b2:*:*:*:*:*:*",
              "matchCriteriaId": "5342045D-CB9F-4663-9538-8B657C9AC833",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:b3:*:*:*:*:*:*",
              "matchCriteriaId": "E9566834-D4EE-4104-AD60-7988FCF17224",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:p1:*:*:*:*:*:*",
              "matchCriteriaId": "F53BB4AD-54A6-4A77-868A-D6972DDF0EAA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:p2:*:*:*:*:*:*",
              "matchCriteriaId": "0405E40E-7969-49B3-90EC-98A982464275",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:p3:*:*:*:*:*:*",
              "matchCriteriaId": "629E039F-1C52-48DF-A952-11220A890AC2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:checkmk:checkmk:2.5.0:p4:*:*:*:*:*:*",
              "matchCriteriaId": "CDC5BD88-F1D9-4ED4-81AA-3E6CD9AF16A8",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Incorrect authorization in the User Messages dashboard widget in Checkmk \u003c2.5.0p5 causes the message-fetching endpoints to return the dashboard creator\u0027s messages rather than the viewer\u0027s, allowing an attacker who knows a valid public dashboard share token to read the issuer\u0027s personal messages by sending requests to the underlying endpoint, even without a User Messages widget present."
    }
  ],
  "id": "CVE-2026-7765",
  "lastModified": "2026-06-17T11:02:56.043",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@checkmk.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-7765",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-08T13:04:52.177100Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-08T13:16:33.627",
  "references": [
    {
      "source": "security@checkmk.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://checkmk.com/werk/19815"
    }
  ],
  "sourceIdentifier": "security@checkmk.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security@checkmk.com",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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