CVE catalog
CVE-2020-6809
UBUNTU-CVE-2020-6809
- Severity
- Medium · CVSS 6.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 1.48% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | firefox | 16.04 | 41.0.2+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 42.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 44.0+build3-0ubuntu2 | vulnerable |
| Ubuntu | firefox | 16.04 | 44.0.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 44.0.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 45.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 45.0.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 45.0.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 16.04 | 46.0+build5-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 46.0.1+build1-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 47.0+build3-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 48.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 49.0+build4-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 49.0.2+build2-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 50.0+build2-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 50.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 50.1.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 51.0.1+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 51.0.1+build2-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 52.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 52.0.1+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 52.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 53.0+build6-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 53.0.2+build1-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 53.0.3+build1-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 54.0+build3-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 55.0.1+build2-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 55.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 56.0+build6-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 56.0+build6-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 57.0+build4-0ubuntu0.16.04.5 | vulnerable |
| Ubuntu | firefox | 16.04 | 57.0+build4-0ubuntu0.16.04.6 | vulnerable |
| Ubuntu | firefox | 16.04 | 57.0.1+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 57.0.3+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 57.0.4+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 58.0+build6-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 58.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 58.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 59.0+build5-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 59.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 59.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 59.0.2+build1-0ubuntu0.16.04.3 | vulnerable |
| Ubuntu | firefox | 16.04 | 60.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 60.0.1+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 60.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 61.0+build3-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 61.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 62.0+build2-0ubuntu0.16.04.3 | vulnerable |
| Ubuntu | firefox | 16.04 | 62.0+build2-0ubuntu0.16.04.4 | vulnerable |
| Ubuntu | firefox | 16.04 | 62.0+build2-0ubuntu0.16.04.5 | vulnerable |
| Ubuntu | firefox | 16.04 | 62.0.3+build1-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 63.0+build2-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 63.0.3+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 64.0+build3-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 65.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 65.0.1+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 66.0+build3-0ubuntu0.16.04.2 | vulnerable |
| Ubuntu | firefox | 16.04 | 66.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 66.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 66.0.3+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 66.0.4+build3-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 66.0.5+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 67.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 67.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 67.0.2+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 67.0.3+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 67.0.4+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 68.0+build3-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 68.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 68.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 69.0+build2-0ubuntu0.16.04.4 | vulnerable |
| Ubuntu | firefox | 16.04 | 69.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 69.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 70.0+build2-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 70.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 71.0+build5-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 72.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 72.0.2+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 73.0.1+build1-0ubuntu0.16.04.1 | vulnerable |
| Ubuntu | firefox | 16.04 | 74.0+build3-0ubuntu0.16.04.1 | fixed |
| Ubuntu | firefox | 18.04 | 56.0+build6-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 18.04 | 57.0.1+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 18.04 | 59.0.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 18.04 | 59.0.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 18.04 | 60.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 18.04 | 60.0.1+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 60.0.2+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 61.0+build3-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 61.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 62.0+build2-0ubuntu0.18.04.3 | vulnerable |
| Ubuntu | firefox | 18.04 | 62.0+build2-0ubuntu0.18.04.4 | vulnerable |
| Ubuntu | firefox | 18.04 | 62.0+build2-0ubuntu0.18.04.5 | vulnerable |
| Ubuntu | firefox | 18.04 | 62.0.3+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 63.0+build2-0ubuntu0.18.04.2 | vulnerable |
| Ubuntu | firefox | 18.04 | 63.0.3+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 64.0+build3-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 65.0+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 65.0.1+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 66.0+build3-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 66.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 66.0.2+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 66.0.3+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 66.0.4+build3-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 66.0.5+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 67.0+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 67.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 67.0.2+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 67.0.3+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 67.0.4+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 68.0+build3-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 68.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 68.0.2+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 69.0+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 69.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 69.0.2+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 70.0+build2-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 70.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 71.0+build5-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 72.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 72.0.2+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 73.0+build3-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 73.0.1+build1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | firefox | 18.04 | 74.0+build3-0ubuntu0.18.04.1 | fixed |
| Ubuntu | mozjs52 | 18.04 | 52.3.1-0ubuntu3 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.3.1-7fakesync1 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.8.1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.9.1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu1 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu3 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu4 | vulnerable |
| Ubuntu | firefox | 20.04 | 69.0.3+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 70.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 70.0+build2-0ubuntu2 | vulnerable |
| Ubuntu | firefox | 20.04 | 70.0.1+build1-0ubuntu2 | vulnerable |
| Ubuntu | firefox | 20.04 | 71.0+build2-0ubuntu2 | vulnerable |
| Ubuntu | firefox | 20.04 | 71.0+build5-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 72.0.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 72.0.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 73.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 73.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 73.0+build3-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 73.0.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 74.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 74.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | firefox | 20.04 | 74.0+build2-0ubuntu2 | vulnerable |
| Ubuntu | firefox | 20.04 | 74.0+build3-0ubuntu1 | fixed |
| Ubuntu | mozjs52 | 20.04 | 52.9.1-1build1 | vulnerable |
| Ubuntu | mozjs52 | 20.04 | 52.9.1-1ubuntu3 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Ubuntu | firefox | deb | 16.04 | 74.0+build3-0ubuntu0.16.04.1 | Not reported | UBUNTU-CVE-2020-6809 | Not reported |
| Ubuntu | firefox | deb | 18.04 | 74.0+build3-0ubuntu0.18.04.1 | Not reported | UBUNTU-CVE-2020-6809 | Not reported |
| Ubuntu | firefox | deb | 20.04 | 74.0+build3-0ubuntu1 | Not reported | UBUNTU-CVE-2020-6809 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: