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.

Project Subscriptions

Vendors Products
Canonical Subscribe
Ubuntu Linux Subscribe
Debian Linux Subscribe
Mozilla Subscribe
Firefox Subscribe
Enterprise Linux Subscribe
Enterprise Linux Desktop Subscribe
Enterprise Linux Server Subscribe
Enterprise Linux Server Eus Subscribe
Enterprise Linux Workstation Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1571-1 firefox-esr security update
Debian DSA Debian DSA DSA-4324-1 firefox-esr security update
EUVD EUVD EUVD-2018-4371 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.
Ubuntu USN Ubuntu USN USN-3801-1 Firefox vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 25 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Vendors & Products Mozilla firefox Esr

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-05T08:30:59.851Z

Reserved: 2018-06-14T00:00:00.000Z

Link: CVE-2018-12397

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-02-28T18:29:00.883

Modified: 2025-11-25T17:50:16.803

Link: CVE-2018-12397

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-10-23T00:00:00Z

Links: CVE-2018-12397 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses