CVE-2020-6809

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CVSS 3.1

7.5 high

EPSS

1%p72

Published

Mar 25, 2020 (Mar 25, 2020)

Modified

Jun 17, 2026

Description

When a Web Extension had the all-urls permission and made a fetch request with a mode set to 'same-origin', it was possible for the Web Extension to read local files. This vulnerability affects Firefox < 74.

Vendors: mozilla
Products: firefox
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.5%)

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