CVE-2026-7013

{
  "id": "CVE-2026-7013",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-26T03:16:00.153",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A security vulnerability has been detected in MaxSite CMS up to 109.3. Affected by this issue is some unknown functionality of the component mail_send Plugin. The manipulation of the argument f_subject/f_files/f_from leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 109.4 can resolve this issue. The identifier of the patch is 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. It is advisable to upgrade the affected component. The vendor was informed early about this issue. They classify it as a \"Self-XSS\". They deployed a countermeasure: \"Nevertheless, we consider this a violation of secure coding standards. The lack of filtering via `htmlspecialchars()` has already been fixed in the latest patch to prevent incorrect data display.\""
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de seguridad ha sido detectada en MaxSite CMS hasta 109.3. Afectada por este problema es alguna funcionalidad desconocida del componente plugin mail_send. La manipulación del argumento f_subject/f_files/f_from lleva a cross site scripting. El ataque puede ser iniciado remotamente. El exploit ha sido divulgado públicamente y puede ser usado. Actualizar a la versión 109.4 puede resolver este problema. El identificador del parche es 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Es aconsejable actualizar el componente afectado. El proveedor fue informado tempranamente sobre este problema. Lo clasifican como un ’Self-XSS’. Desplegaron una contramedida: ’Sin embargo, consideramos esto una violación de los estándares de codificación segura. La falta de filtrado vía “htmlspecialchars()” ya ha sido corregida en el último parche para prevenir la visualización incorrecta de datos.’"
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "MaxSite",
          "product": "CMS",
          "modules": [
            "mail_send Plugin"
          ],
          "versions": [
            {
              "version": "109.0",
              "status": "affected"
            },
            {
              "version": "109.1",
              "status": "affected"
            },
            {
              "version": "109.2",
              "status": "affected"
            },
            {
              "version": "109.3",
              "status": "affected"
            },
            {
              "version": "109.4",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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",
          "baseScore": 1.9,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "HIGH",
          "userInteraction": "PASSIVE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
          "baseScore": 2.4,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:M/C:N/I:P/A:N",
          "baseScore": 3.3,
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "MULTIPLE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE"
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 6.4,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-27T12:41:47.766600Z",
          "id": "CVE-2026-7013",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/maxsite/cms/",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/maxsite/cms/commit/8a3946bd0a54bfb72a4d57179fcd253f2c550cd7",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/maxsite/cms/releases/tag/v109",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/wnaspy/CVE/blob/main/Report-%20Stored%20XSS-in-mail_send-plugin-maxsite-cms.pdf.pdf",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/submit/796738",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/vuln/359592",
      "source": "[email protected]"
    },
    {
      "url": "https://vuldb.com/vuln/359592/cti",
      "source": "[email protected]"
    }
  ]
}