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CVE-2025-20382

Status: AnalyzedMedium (5.4)—

In Splunk Enterprise versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, and Splunk Cloud Platform versions below 10.1.2507.10, 10.0.2503.8, and 9.3.2411.120, a low-privileged user that does not hold the "admin" or "power" Splunk roles could create a views dashboard with a custom background using the `data:image/png;base64` protocol that could potentially lead to an unvalidated redirect. This behavior circumvents the Splunk external URL warning mechanism by using a specially crafted URL, allowing for a redirection to an external malicious site. The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The authenticated user should not be able to exploit the vulnerability at will.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Splunk — SplunkSplunk — Splunk Cloud Platform

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2025-20382",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-20382",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-12-03T21:28:22.162687Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@cisco.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 3.5,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "Splunk",
          "product": "Splunk Enterprise",
          "versions": [
            {
              "status": "affected",
              "version": "10.0",
              "lessThan": "10.0.2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "9.4",
              "lessThan": "9.4.6",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "9.3",
              "lessThan": "9.3.8",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "9.2",
              "lessThan": "9.2.10",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Splunk",
          "product": "Splunk Cloud Platform",
          "versions": [
            {
              "status": "affected",
              "version": "10.1.2507",
              "lessThan": "10.1.2507.10",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "10.0.2503",
              "lessThan": "10.0.2503.8",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "9.3.2411",
              "lessThan": "9.3.2411.120",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-12-03T17:15:50.380",
  "references": [
    {
      "url": "https://advisory.splunk.com/advisories/SVD-2025-1201",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Splunk Enterprise versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, and Splunk Cloud Platform versions below 10.1.2507.10, 10.0.2503.8, and 9.3.2411.120, a low-privileged user that does not hold the \"admin\" or \"power\" Splunk roles could create a views dashboard with a custom background using the `data:image/png;base64` protocol that could potentially lead to an unvalidated redirect. This behavior circumvents the Splunk external URL warning mechanism by using a specially crafted URL, allowing for a redirection to an external malicious site. The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The authenticated user should not be able to exploit the vulnerability at will."
    },
    {
      "lang": "es",
      "value": "En las versiones de Splunk Enterprise anteriores a 10.0.2, 9.4.6, 9.3.8 y 9.2.10, y en las versiones de Splunk Cloud Platform anteriores a 10.1.2507.10, 10.0.2503.8 y 9.3.2411.120, un usuario con privilegios bajos que no posee los roles de Splunk 'admin' o 'power' podría crear un panel de vistas con un fondo personalizado utilizando el protocolo 'data:image/png;base64' que podría conducir potencialmente a una redirección no validada. Este comportamiento elude el mecanismo de advertencia de URL externa de Splunk mediante el uso de una URL especialmente diseñada, permitiendo una redirección a un sitio malicioso externo. La vulnerabilidad requiere que el atacante realice phishing a la víctima engañándolos para que inicien una solicitud dentro de su navegador. El usuario autenticado no debería poder explotar la vulnerabilidad a voluntad."
    }
  ],
  "lastModified": "2026-06-17T08:41:39.100",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AE8BF109-2B9C-4C50-AC9F-10A45456FD75",
              "versionEndExcluding": "9.2.10",
              "versionStartIncluding": "9.2.0"
            },
            {
              "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "05D6973D-D965-42D3-8320-AF4A4B424E6C",
              "versionEndExcluding": "9.3.8",
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            },
            {
              "criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*",
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              "matchCriteriaId": "8571F470-6AE1-4737-B1FA-49121E426AF2",
              "versionEndExcluding": "9.4.6",
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            {
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              "matchCriteriaId": "B6CA3000-9C26-45B9-A2A2-C22F3F4246BC",
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            },
            {
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            },
            {
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              "vulnerable": true,
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          "operator": "OR"
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  ],
  "sourceIdentifier": "psirt@cisco.com"
}