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CVE-2015-7215

Status: ModifiedMedium (5)—

The importScripts function in the Web Workers API implementation in Mozilla Firefox before 43.0 allows remote attackers to bypass the Same Origin Policy by triggering use of the no-cors mode in the fetch API to attempt resource access that throws an exception, leading to information disclosure after a rethrow.

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 (4)

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2015-7215",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
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      "source": "security@mozilla.org",
      "affectedData": [
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          "product": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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  ],
  "published": "2015-12-16T11:59:13.540",
  "references": [
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      "url": "http://www.ubuntu.com/usn/USN-2833-1",
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  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
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    {
      "lang": "en",
      "value": "The importScripts function in the Web Workers API implementation in Mozilla Firefox before 43.0 allows remote attackers to bypass the Same Origin Policy by triggering use of the no-cors mode in the fetch API to attempt resource access that throws an exception, leading to information disclosure after a rethrow."
    },
    {
      "lang": "es",
      "value": "La función importScripts en la implementación API Web Workers en Mozilla Firefox en versiones anteriores a 43.0 permite a atacantes remotos eludir la Same Origin Policy desencadenando el uso del modo no-cors en la API fetch para intentar acceder a los recursos que producen una excepción, dando lugar a la divulgación de información después de un volver a lanzar."
    }
  ],
  "lastModified": "2026-06-17T00:32:03.660",
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}