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CVE-2018-4233

76
FAUCET Score

CVE-2018-4233 is a critical WebKit vulnerability affecting multiple Apple products, including iOS, Safari, iCloud for Windows, iTunes for Windows, tvOS, and watchOS, allowing remote attackers to execute arbitrary code or cause a denial of service through memory corruption via a crafted website. With a CVSS score of 8.8 (HIGH), this vulnerability is easily exploitable over a network with low attack complexity and user interaction, potentially leading to high impacts on confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, multiple Metasploit modules and an ExploitDB entry confirm the availability of exploit code, and the vulnerability has garnered significant community discussion and media coverage, indicating its high risk and potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.1.1CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
< 11.4CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 11.4CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
< 4.3.1CPE matchmatch criteria
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
< 7.5CPE matchmatch criteria
cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
53.77%
Probability of exploitation in next 30 days
EPSS Percentile
98.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: Safari Webkit Proxy Object Type Confusion · Mar 15, 2018
ExploitDB: EDB-45998 · Dec 14, 2018
This CVE's current EPSS score of 0.5377 is in the 99th percentile among its peer group of 14,825 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

packetstormsecurity.com / files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
security.gentoo.org / glsa/201808-04
Third Party Advisory
support.apple.com / HT208848
Vendor Advisory
support.apple.com / HT208850
Vendor Advisory
support.apple.com / HT208851
Vendor Advisory
support.apple.com / HT208852
Vendor Advisory
support.apple.com / HT208853
Vendor Advisory
support.apple.com / HT208854
Vendor Advisory
usn.ubuntu.com / 3687-1
Third Party Advisory
exploit-db.com / exploits/45998
ExploitThird Party AdvisoryVDB Entry
securitytracker.com / id/1041029
Third Party AdvisoryVDB Entry