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CVE-2021-22676

Estado: ModificadaMedia (6.1)—

UserExcelOut.asp within WebAccess/SCADA is vulnerable to cross-site scripting (XSS), which could allow an attacker to send malicious JavaScript code. This could result in hijacking of cookie/session tokens, redirection to a malicious webpage, and unintended browser action on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Advantech — Webaccess/scada

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-22676",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "WebAccess/SCADA",
          "versions": [
            {
              "status": "affected",
              "version": "WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-10T15:15:07.457",
  "references": [
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "ics-cert@hq.dhs.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "UserExcelOut.asp within WebAccess/SCADA is vulnerable to cross-site scripting (XSS), which could allow an attacker to send malicious JavaScript code. This could result in hijacking of cookie/session tokens, redirection to a malicious webpage, and unintended browser action on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1)."
    },
    {
      "lang": "es",
      "value": "El archivo UserExcelOut.asp dentro de WebAccess/SCADA es vulnerable a un ataque de tipo cross-site scripting (XSS), que podría permitir a un atacante enviar código JavaScript malicioso. Esto podría resultar en el secuestro de los tokens de cookies/sesión, la redirección a una página web maliciosa, y la acción involuntaria del navegador en el WebAccess/SCADA (WebAccess/SCADA versiones anteriores a 8.4.5, WebAccess/SCADA versiones anteriores a 9.0.1)"
    }
  ],
  "lastModified": "2026-06-17T03:37:33.647",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:advantech:webaccess\\/scada:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6F0F1E90-D14C-49A1-8EC2-3AF211C36FFF",
              "versionEndExcluding": "8.4.5"
            },
            {
              "criteria": "cpe:2.3:a:advantech:webaccess\\/scada:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F748CA2A-6623-4D12-86E1-4F51FD9EA193",
              "versionEndExcluding": "9.0.1",
              "versionStartIncluding": "9.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}