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Vulnerability details: VCID-x3ad-9v33-a3ek
Vulnerability ID VCID-x3ad-9v33-a3ek
Aliases CVE-2018-4121
Summary webkitgtk: memory corruption processing maliciously crafted web content
Status Published
Exploitability 2.0
Weighted Severity 7.9
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
cvssv3 5.0 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.json
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.39723 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
cvssv3 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4121
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4121
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.json
https://api.first.org/data/v1/epss?cve=CVE-2018-4121
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4121
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/mwrlabs/CVE-2018-4121
https://support.apple.com/HT208693
https://support.apple.com/HT208694
https://support.apple.com/HT208695
https://support.apple.com/HT208696
https://support.apple.com/HT208697
https://support.apple.com/HT208698
https://www.exploit-db.com/exploits/44427/
http://www.securitytracker.com/id/1040604
1577387 https://bugzilla.redhat.com/show_bug.cgi?id=1577387
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
CVE-2018-4121 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1522
CVE-2018-4121 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/44427.txt
CVE-2018-4121 https://nvd.nist.gov/vuln/detail/CVE-2018-4121
Data source Exploit-DB
Date added April 9, 2018
Description WebKit - WebAssembly Parsing Does not Correctly Check Section Order
Ransomware campaign use Known
Source publication date April 9, 2018
Exploit type dos
Platform multiple
Source update date April 9, 2018
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1522
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.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: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-2018-4121
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-2018-4121
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 0.97179
EPSS Score 0.39723
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T10:43:05.135816+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.json 37.0.0