CVE-2016-4651

Cross-site scripting (XSS) vulnerability in the WebKit JavaScript bindings in Apple iOS before 9...

6.1 MediumFix available

Cross-site scripting (XSS) vulnerability in the WebKit JavaScript bindings in Apple iOS before 9.3.3 and Safari before 9.1.2 allows remote attackers to inject arbitrary web script or HTML via a crafted HTTP/0.9 response, related to a "cross-protocol cross-site scripting (XPXSS)" vulnerability.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

2.26%Up 0.9 points since Feb 4, 2022

What each source reports

NVD Score used 6.1

Record: CVE-2016-4651
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Record: CVE-2016-4651
Updated: 2026-11-02

EUVDEUVD-2016-5637 No score

Record: EUVD-2016-5637
Updated: 2026-11-03

GitHub AdvisoriesGHSA-377q-pqm6-wg2h 6.1

Cross-site scripting (XSS) vulnerability in the WebKit JavaScript bindings in Apple iOS before 9...

Record: GHSA-377q-pqm6-wg2h
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSVUBUNTU-CVE-2016-4651 6.1

Record: UBUNTU-CVE-2016-4651
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVUSN-3079-1 No score

webkit2gtk vulnerabilities

A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Record: USN-3079-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`webkit2gtk` Ubuntu:16.04:LTS	before 2.12.5-0ubuntu0.16.04.1, plus listed versions 2.8.5+dfsg1-32.10.3+dfsg1-12.10.4+dfsg1-12.10.5-12.10.6-12.10.6-1ubuntu12.10.8-1ubuntu12.10.9-1ubuntu1	2.12.5-0ubuntu0.16.04.1
`qtwebkit-opensource-src` Ubuntu:16.04:LTS	All versions, plus listed versions 5.4.2+dfsg-1ubuntu2.15.5.1+dfsg-2ubuntu1	None known
`qtwebkit-source` Ubuntu:16.04:LTS	All versions, plus listed versions 2.3.2-0ubuntu102.3.2-0ubuntu11	None known
`webkitgtk` Ubuntu:16.04:LTS	All versions, plus listed versions 2.4.9-2ubuntu22.4.10-0ubuntu12.4.11-0ubuntu0.1	None known
`webkit2gtk` Ubuntu:16.04:LTS From an advisory covering 16 CVEs	before 2.12.5-0ubuntu0.16.04.1, plus listed versions 2.8.5+dfsg1-32.10.3+dfsg1-12.10.4+dfsg1-12.10.5-12.10.6-12.10.6-1ubuntu12.10.8-1ubuntu12.10.9-1ubuntu1	2.12.5-0ubuntu0.16.04.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-4651 is a medium vulnerability (CVSS 6.1) in Apple Safari, published July 21, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.26%, the 83rd percentile. Fixed in webkit2gtk 2.12.5-0ubuntu0.16.04.1.

References

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