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CVE-2020-6809

Date: March 25, 2020

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.

Language: C++

Severity Score

Related Resources (6)

https://people.canonical.com/~ubuntu-security/cve/CVE-2020-6809
https://www.mozilla.org/security/advisories/mfsa2020-08/
https://bugzilla.mozilla.org/show_bug.cgi?id=1420296
https://access.redhat.com/security/cve/CVE-2020-6809
https://nvd.nist.gov/vuln/detail/CVE-2020-6809
https://www.mend.io/vulnerability-database/CVE-2020-6809

Severity Score

Weakness Type (CWE)

Information Leak / Disclosure

CWE-200

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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