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Vulnerability details: VCID-xnhv-bysx-pyfe
Vulnerability ID VCID-xnhv-bysx-pyfe
Aliases CVE-2018-4218
Summary An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers an @generatorState use-after-free.
Status Published
Exploitability 2.0
Weighted Severity 7.9
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53013 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53585 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53585 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53585 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
epss 0.53585 https://api.first.org/data/v1/epss?cve=CVE-2018-4218
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-2018-4218
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4218
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-4218
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4218
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.exploit-db.com/exploits/44861/
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:*:*:*:*:*:*:*:*
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-2018-4218 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1553
CVE-2018-4218 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/44861.html
CVE-2018-4218 https://nvd.nist.gov/vuln/detail/CVE-2018-4218
USN-3687-1 https://usn.ubuntu.com/3687-1/
Data source Exploit-DB
Date added June 8, 2018
Description WebKit - Use-After-Free when Resuming Generator
Ransomware campaign use Known
Source publication date June 8, 2018
Exploit type dos
Platform multiple
Source update date June 8, 2018
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1553
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-2018-4218
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-2018-4218
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 0.97844
EPSS Score 0.53013
Published At Aug. 6, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:36:22.256030+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/3687-1/ 37.0.0