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Vulnerability details: VCID-vvs3-bevn-7ff3
Vulnerability ID VCID-vvs3-bevn-7ff3
Aliases CVE-2018-12370
Summary In Reader View SameSite cookie protections are not checked on exiting. This allows for a payload to be triggered when Reader View is exited if loaded by a malicious site while Reader mode is active, bypassing CSRF protections.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-829 Inclusion of Functionality from Untrusted Control Sphere
CWE-352 Cross-Site Request Forgery (CSRF)
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12370.json
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00384 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00392 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00392 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00392 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
epss 0.00392 https://api.first.org/data/v1/epss?cve=CVE-2018-12370
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2018-12370
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-12370
archlinux Critical https://security.archlinux.org/AVG-727
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-15
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12370.json
https://api.first.org/data/v1/epss?cve=CVE-2018-12370
https://bugzilla.mozilla.org/show_bug.cgi?id=1456652
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/201810-01
https://www.mozilla.org/security/advisories/mfsa2018-15/
http://www.securitytracker.com/id/1041193
1595035 https://bugzilla.redhat.com/show_bug.cgi?id=1595035
ASA-201806-14 https://security.archlinux.org/ASA-201806-14
AVG-727 https://security.archlinux.org/AVG-727
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: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:17.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
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:*:*:*
CVE-2018-12370 https://nvd.nist.gov/vuln/detail/CVE-2018-12370
mfsa2018-15 https://www.mozilla.org/en-US/security/advisories/mfsa2018-15
USN-3705-1 https://usn.ubuntu.com/3705-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-12370.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:H/PR:N/UI:R/S:U/C:H/I:H/A:H 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:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12370
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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-12370
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 0.59036
EPSS Score 0.00384
Published At Aug. 3, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:52.422643+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2018/mfsa2018-15.yml 37.0.0