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CVE-2019-17019

Status: ModifiedHigh (8.8)—

When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 72.

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 (1)

Mozilla — Firefox

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2019-17019",
  "cveTags": [],
  "metrics": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
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          "confidentialityImpact": "PARTIAL"
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  "published": "2020-01-08T22:15:12.497",
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1568003",
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  "vulnStatus": "Modified",
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  "descriptions": [
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      "lang": "en",
      "value": "When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 72."
    },
    {
      "lang": "es",
      "value": "Cuando Python se instaló en Windows, un archivo de Python que es servido con el tipo MIME de text/plain podría ser ejecutado por Python en lugar de abrirlo como un archivo de texto cuando la opción Open fue seleccionada al descargar. *Nota: este problema se presenta solo en Windows. Otros sistemas operativos no están afectados. *. Esta vulnerabilidad afecta a Firefox versiones anteriores a la versión  72."
    }
  ],
  "lastModified": "2026-06-17T02:23:10.117",
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