CVE-2020-12392

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data 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 the disclosure of local files. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
Mozilla	Firefox ESR	>= unspecified, < 68.8
Mozilla	Firefox	>= unspecified, < 76
Mozilla	Thunderbird	>= unspecified, < 68.8.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1614468Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202005-03Third Party Advisory
https://security.gentoo.org/glsa/202005-04Third Party Advisory
https://usn.ubuntu.com/4373-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-17/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-18/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1614468Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202005-03Third Party Advisory
https://security.gentoo.org/glsa/202005-04Third Party Advisory
https://usn.ubuntu.com/4373-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-17/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-18/Vendor Advisory

Timeline

Published: May 26, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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