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CVE-2018-18495

Published: 11 December 2018

WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. This vulnerability affects Firefox < 64.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
upstream
Released (64.0)
xenial
Released (64.0+build3-0ubuntu0.16.04.1)
bionic
Released (64.0+build3-0ubuntu0.18.04.1)
cosmic
Released (64.0+build3-0ubuntu0.18.10.1)
trusty
Released (64.0+build3-0ubuntu0.14.04.1)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N