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Vulnerability details: VCID-gkns-jvxa-93cw
Vulnerability ID VCID-gkns-jvxa-93cw
Aliases CVE-2018-12397
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-862 Missing Authorization
System Score Found at
cvssv3 7.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12397.json
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
epss 0.00085 https://api.first.org/data/v1/epss?cve=CVE-2018-12397
cvssv3 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 3.6 https://nvd.nist.gov/vuln/detail/CVE-2018-12397
cvssv3 7.1 https://nvd.nist.gov/vuln/detail/CVE-2018-12397
archlinux Critical https://security.archlinux.org/AVG-787
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-26
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-27
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2018:3005
https://access.redhat.com/errata/RHSA-2018:3006
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12397.json
https://api.first.org/data/v1/epss?cve=CVE-2018-12397
https://bugzilla.mozilla.org/show_bug.cgi?id=1487478
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12389
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12390
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12392
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12393
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12395
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12396
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12397
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html
https://security.gentoo.org/glsa/201811-04
https://www.debian.org/security/2018/dsa-4324
https://www.mozilla.org/security/advisories/mfsa2018-26/
https://www.mozilla.org/security/advisories/mfsa2018-27/
http://www.securityfocus.com/bid/105718
http://www.securitytracker.com/id/1041944
1642187 https://bugzilla.redhat.com/show_bug.cgi?id=1642187
ASA-201810-14 https://security.archlinux.org/ASA-201810-14
AVG-787 https://security.archlinux.org/AVG-787
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
CVE-2018-12397 https://nvd.nist.gov/vuln/detail/CVE-2018-12397
mfsa2018-26 https://www.mozilla.org/en-US/security/advisories/mfsa2018-26
mfsa2018-27 https://www.mozilla.org/en-US/security/advisories/mfsa2018-27
USN-3801-1 https://usn.ubuntu.com/3801-1/
No exploits are available.
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12397.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12397
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12397
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.25619
EPSS Score 0.00085
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:54.771976+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2018/mfsa2018-27.yml 37.0.0