CVE-2025-26210

{
  "id": "CVE-2025-26210",
  "sourceIdentifier": "[email protected]",
  "published": "2025-09-03T14:15:44.430",
  "lastModified": "2026-11-07T18:10:00.200",
  "vulnStatus": "Analyzed",
  "cveTags": [
    {
      "sourceIdentifier": "[email protected]",
      "tags": [
        "disputed"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain. NOTE: some third parties have indicated that this is intended behavior."
    },
    {
      "lang": "es",
      "value": "DeepSeek R1 hasta V3.1 permite XSS, como se demuestra mediante la ejecución de JavaScript en el contexto del dominio run-html-chat.deepseeksvc.com. NOTA: algunos terceros han indicado que este es un comportamiento intencionado."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "version": "n/a",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-09-08T17:37:20.327016Z",
          "id": "CVE-2025-26210",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:deepseek:deepseek-r1:1.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "65A5D72C-C327-4A9E-AA69-A9B18AED07E6"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:deepseek:deepseek-v2:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "CCAE8C5A-E47F-4053-B8BE-B2849A5B187D"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:deepseek:deepseek-v3:1.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "7E915B8C-D3B1-4300-BF8A-2FED196BC8EF"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://deepseek.com",
      "source": "[email protected]",
      "tags": [
        "Permissions Required"
      ]
    },
    {
      "url": "https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseek",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://youtu.be/IgQwy52FVT4",
      "source": "[email protected]",
      "tags": [
        "Exploit"
      ]
    }
  ]
}