CVE-2016-4003

Cross-site Scripting in Apache Struts

6.1 MediumFix available

Cross-site scripting (XSS) vulnerability in the URLDecoder function in JRE before 1.8, as used in Apache Struts 2.x before 2.3.28, when using a single byte page encoding, allows remote attackers to inject arbitrary web script or HTML via multi-byte characters in a url-encoded parameter.

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

11.6%Up 7.3 points since Feb 4, 2022

What each source reports

NVD Score used 6.1

Record: CVE-2016-4003
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-2016-4003
Updated: 2026-11-02

EUVDEUVD-2022-4483 No score

Record: EUVD-2022-4483
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m3x6-9v6h-4g28 6.1

Cross-site Scripting in Apache Struts

Record: GHSA-m3x6-9v6h-4g28
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

OSV 6.1

Record: CVE-2016-4003
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

OSVGHSA-m3x6-9v6h-4g28 6.1

Cross-site Scripting in Apache Struts

Record: GHSA-m3x6-9v6h-4g28
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

Affected products

apache struts

Affected packages

Affected packages
Package	Affected	Fixed
`org.apache.struts:struts2-core` Maven	2.0.0 up to 2.3.28	2.3.28
`org.apache.struts:struts2-core` Maven	2.0.0 up to 2.3.28, plus listed versions 2.0.112.0.11.12.0.11.22.0.122.0.14 Show 39 moreShow less 2.0.52.0.62.0.82.0.92.1.22.1.62.1.82.1.8.12.2.12.2.1.12.2.32.2.3.12.3.12.3.1.12.3.1.22.3.122.3.142.3.14.12.3.14.22.3.14.32.3.152.3.15.12.3.15.22.3.15.32.3.162.3.16.12.3.16.22.3.16.32.3.202.3.20.12.3.20.32.3.242.3.24.12.3.24.32.3.32.3.42.3.4.12.3.72.3.8	2.3.28

History

History
Recorded	Changed	Sources
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-2016-4003 is a medium vulnerability (CVSS 6.1) in Apache Struts, published April 12, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 11.6%, the 96th percentile. Fixed in org.apache.struts:struts2-core 2.3.28.

References

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