Vulnerability Database

314,373

Total vulnerabilities in the database

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: Mar 25, 2020
  • Updated: Nov 9, 2025
  • CVE: CVE-2020-6809
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:P/I:N/A:N

No CWE or OWASP classifications available.

Software From Fixed in
mozilla / firefox - 74.0