CVE-2020-6811

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-77

Affected software

Vendor	Product	Versions
Mozilla	Thunderbird	>= unspecified, < 68.6
Mozilla	Firefox	>= unspecified, < 74; >= unspecified, < ESR68.6
Mozilla	Firefox ESR	>= unspecified, < 68.6

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1607742Exploit, Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/4328-1/Third Party Advisory
https://usn.ubuntu.com/4335-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-08/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-09/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-10/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1607742Exploit, Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/4328-1/Third Party Advisory
https://usn.ubuntu.com/4335-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-08/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-09/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-10/Vendor Advisory

Timeline

Published: Mar 25, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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