{"cve":"CVE-2018-12397","nvd":{"published":"2019-02-28T18:29:00.883","modified":"2026-06-17T01:37:42.530","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":7.1},"cwes":["CWE-200"],"references":["http://www.securityfocus.com/bid/105718","http://www.securitytracker.com/id/1041944","https://access.redhat.com/errata/RHSA-2018:3005","https://access.redhat.com/errata/RHSA-2018:3006","https://bugzilla.mozilla.org/show_bug.cgi?id=1487478"],"products":["canonical:ubuntu_linux","debian:debian_linux","mozilla:firefox","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_server_eus","redhat:enterprise_linux_workstation"],"source":"nvd","synced_at":"2026-10-19T20:54:46.948512734+00:00"},"epss":{"cve":"CVE-2018-12397","score":0.00371,"percentile":0.31105,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}