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CVE-2016-4651

22
FAUCET Score

CVE-2016-4651 is a cross-site scripting (XSS) vulnerability affecting Apple iOS before version 9.3.3 and Safari before 9.1.2. This flaw, related to a "cross-protocol cross-site scripting (XPXSS)" issue, allows remote attackers to inject arbitrary web script or HTML through a specially crafted HTTP/0.9 response. Rated as medium severity (CVSS 6.1), it requires user interaction and can lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 9.3.2CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
<= 9.1.1CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.26%
Probability of exploitation in next 30 days
EPSS Percentile
81.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0226 is in the 91st percentile among its peer group of 26,219 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2016/Jul/msg00001.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00004.html
Mailing ListVendor Advisory
packetstormsecurity.com / files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
support.apple.com / HT206900
Vendor Advisory
support.apple.com / HT206902
Vendor Advisory
securityfocus.com / archive/1/539295/100/0/threaded
securityfocus.com / bid/91835
securitytracker.com / id/1036343