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CVE-2021-42856

Estado: ModificadaMedia (6.1)—

It was discovered that the /DsaDataTest endpoint is susceptible to Cross-site scripting (XSS) attack. It was noted that the Metric parameter does not have any input checks on the user input that allows an attacker to craft its own malicious payload to trigger a XSS vulnerability.

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)

Riverbed — Steelcentral Appinternals Dynamic Sampling Agent

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-42856",
  "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": [
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        "type": "Secondary",
        "source": "cve_disclosure@tech.gov.sg",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 4.7,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
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          "integrityImpact": "LOW",
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          "confidentialityImpact": "LOW"
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        "impactScore": 2.7,
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  },
  "affected": [
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      "affectedData": [
        {
          "vendor": "Aternity",
          "product": "SteelCentral AppInternals Dynamic Sampling Agent",
          "versions": [
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              "status": "affected",
              "version": "10.x"
            },
            {
              "status": "affected",
              "version": "12.13.0",
              "lessThan": "12.13.0",
              "versionType": "custom"
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              "status": "affected",
              "version": "11.8.8",
              "lessThan": "11.8.8",
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  ],
  "published": "2022-03-10T17:44:07.997",
  "references": [
    {
      "url": "https://aternity.force.com/customersuccess/s/article/Reflected-Cross-site-Scripting-at-DsaDataTest-CVE-2021-42856",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve_disclosure@tech.gov.sg"
    },
    {
      "url": "https://aternity.force.com/customersuccess/s/article/Reflected-Cross-site-Scripting-at-DsaDataTest-CVE-2021-42856",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve_disclosure@tech.gov.sg",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "It was discovered that the /DsaDataTest endpoint is susceptible to Cross-site scripting (XSS) attack. It was noted that the Metric parameter does not have any input checks on the user input that allows an attacker to craft its own malicious payload to trigger a XSS vulnerability."
    },
    {
      "lang": "es",
      "value": "Se ha detectado que el endpoint /DsaDataTest es susceptible de sufrir un ataque de tipo cross-site scripting (XSS). Se ha detectado que el parámetro Metric no presenta ninguna comprobación de entrada en la entrada del usuario que permite a un atacante elaborar su propia carga útil maliciosa para desencadenar una vulnerabilidad de tipo XSS"
    }
  ],
  "lastModified": "2026-06-17T04:10:12.910",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:riverbed:steelcentral_appinternals_dynamic_sampling_agent:*:*:*:*:*:*:*:*",
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  "sourceIdentifier": "cve_disclosure@tech.gov.sg"
}