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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefoxUpgrade librewolf | Aug 22, 2024 | Mar 25, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Mar 25, 2020 |
| Mfsa2020 08 | — | Upgrade to Mozilla Firefox version 74.0 | Mar 11, 2020 | Mar 10, 2020 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 25, 2020 |
| Ubuntu | — | Upgrade firefox | Mar 12, 2020 | Mar 11, 2020 |
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