Vulnerability in Mozilla Firefox
CVE-2020-6809
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000
Affected products
- Mozilla Firefox — versions unspecified
Public proof-of-concept exploits
References
- www.mozilla.org/security/advisories/mfsa2020-08/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-6809?
- CVE-2020-6809 is a high-severity vulnerability in Mozilla Firefox. CVSS score: 7.5/10. Published 2020-03-25.
- How severe is CVE-2020-6809?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-6809 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.