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CVE-2020-6811

Status: ModifiedHigh (8.8)—

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as Curl' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

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)

Canonical — Ubuntu LinuxMozilla — FirefoxMozilla — Firefox ESRMozilla — Thunderbird

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2020-6811",
  "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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        "impactScore": 6.4,
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          "userInteraction": "REQUIRED",
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          "privilegesRequired": "NONE",
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  "affected": [
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      "affectedData": [
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  "published": "2020-03-25T22:15:12.763",
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      "description": [
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          "value": "CWE-77"
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      "lang": "en",
      "value": "The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as Curl' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6."
    },
    {
      "lang": "es",
      "value": "La funcionalidad \"Copy as cURL\" de la pestaña de red de Devtools no escapó correctamente el método HTTP de una petición, que puede ser controlada por el sitio web. Si un usuario utilizó la funcionalidad \"Copy as Curl\" y pegó el comando a un terminal, podría haber resultado en una inyección de comandos y una ejecución de comandos arbitraria. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 68.6, Firefox versiones anteriores a 74, Firefox versiones anteriores a ESR68.6 y Firefox ESR versiones anteriores a 68.6."
    }
  ],
  "lastModified": "2026-06-17T03:23:51.010",
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