--- title: "CVE-2018-12397\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2018-12397?format=md keywords: index, follow --- # CVE-2018-12397 Publication date 24 October 2018 Last updated 25 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **7.1 · High** [Score breakdown](https://ubuntu.com/security/CVE-2018-12397?format=md#impact-score) Toggle side navigation ## Description A WebExtension can request access to local files without the warning prompt stating that the extension will "Access your data for all websites" being displayed to the user. This allows extensions to run content scripts in local pages without permission warnings when a local file is opened. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63. [Read the notes from the security team](https://ubuntu.com/security/CVE-2018-12397?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | firefox | 24.04 LTS noble | Fixed 63.0+build1-0ubuntu1 | | 23.10 mantic | Fixed 63.0+build1-0ubuntu1 | | 23.04 lunar | Fixed 63.0+build1-0ubuntu1 | | 22.10 kinetic | Fixed 63.0+build1-0ubuntu1 | | 22.04 LTS jammy | Fixed 63.0+build1-0ubuntu1 | | 21.10 impish | Fixed 63.0+build1-0ubuntu1 | | 21.04 hirsute | Fixed 63.0+build1-0ubuntu1 | | 20.10 groovy | Fixed 63.0+build1-0ubuntu1 | | 20.04 LTS focal | Fixed 63.0+build1-0ubuntu1 | | 19.10 eoan | Fixed 63.0+build1-0ubuntu1 | | 19.04 disco | Fixed 63.0+build1-0ubuntu1 | | 18.10 cosmic | Fixed 63.0+build2-0ubuntu0.18.10.2 | | 18.04 LTS bionic | Fixed 63.0+build2-0ubuntu0.18.04.2 | | 16.04 LTS xenial | Fixed 63.0+build2-0ubuntu0.16.04.2 | | 14.04 LTS trusty | Fixed 63.0+build2-0ubuntu0.14.04.2 | | firefox-esr | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not in release | | 19.04 disco | Not in release | | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | mozjs38 | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not in release | | 19.04 disco | Not in release | | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Ignored | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | mozjs52 | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Ignored end of life | | 20.04 LTS focal | Ignored | | 19.10 eoan | Ignored end of life | | 19.04 disco | Ignored end of life | | 18.10 cosmic | Ignored end of life | | 18.04 LTS bionic | Ignored | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | mozjs60 | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Ignored end of life | | 19.04 disco | Ignored end of life | | 18.10 cosmic | Ignored end of life | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [tyhicks](https://launchpad.net/~tyhicks) mozjs contains a copy of the SpiderMonkey JavaScript engine ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 7.1 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Local | | Attack complexity | Low | | Privileges required | Low | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | High | | Integrity impact | High | | Availability impact | None | * Scores | Parameter | Value | | --- | --- | | Base score | 7.1 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12397) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-12397) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-12397) * [Debian](https://security-tracker.debian.org/tracker/CVE-2018-12397) ### Related Ubuntu Security Notices (USN) + [USN-3801-1](https://usn.ubuntu.com/USN-3801-1) + Firefox vulnerabilities + 24 October 2018 ### Other references * * *